Patent Publication Number: US-2011060804-A1

Title: Method and apparatus for processing electronic messages

Description:
This application is a continuation of co-pending U.S. patent application Ser. No. 11/496,865 filed on Jul. 31, 2006, which is a continuation of U.S. patent application Ser. No. 10/741,948 filed on Dec. 19, 2003, now issued as U.S. Pat. No. 7,836,136. 
    
    
     FIELD OF THE INVENTION 
     The present invention relates generally to data processing. More particularly, this invention relates to electronic message processing. 
     BACKGROUND OF THE INVENTION 
     In computer network systems such as local-area networks (“LANs”), wide-area networks (“WANs”), and the Internet and the worldwide web (“WWW”) which operates thereon, email systems and associated protocols are often utilized to facilitate communication between two users of the network or email system. Each user has a unique network address which may be used for routing and identifying purposes in delivering an email message from one user (the “sender”) to another user (the “recipient”) on the network. 
     Email messages are typically sent from a sender to a recipient by the sender typing or otherwise preparing an email message on a PC (personal computer), which is itself typically coupled to a server coupled to a communications network such as the Internet. The email contains both a body or content portion, which contains the message itself, and the network email address(es) of the recipient(s). Email messages can also include more complex information such as attached files. In general, however, each email transmission from a sender to a recipient over a network includes some body or message portion and the network addresses of the sender and recipient. The email transmission may be referred to, in general, as an email message, which is transmitted via a network from a sender to a recipient. 
     The email message is thus transmitted from the sender PC to the local network router or server (e.g., an email server), which delivers the email message in packetized form to the network. The packets are each routed from one node of the network to another, in accordance with the recipient address information associated with the packets. These packets are received by a recipient server of the network, which can then assemble the received packets into the original email message and deliver the email message to the recipient&#39;s PC, which is attached to the recipient server. The email message may be routed through one or more routing servers between the sender&#39;s server and the recipient&#39;s server. These routing servers may be different types of servers provided by different vendors. The routing servers may queue and schedule the routing the email message according to its own schedule. As a result, the delivery of the email message may be delayed by the routing servers and such delays are sometimes unacceptable. In addition, such delay prevents the recipient from providing the sender an instant confirmation of arrival of the email message at the recipient, even if the sender enables a return receipt option on the outgoing email message. 
     For many users, the send and receive email server functions are performed by a service provider such as an Internet service provider (ISP). In order to receive email, a user must first “log in” to his ISP, typically by use of a modem and telephone line or other communications channel such as a cable system cable. Any email messages which have been received by the ISP for the user since the last time the user logged in to his ISP may then be delivered to the user-recipient. If the user keeps his PC continually logged on to his ISP and is present at his PC, he can receive email as soon as it is received by his ISP. The user&#39;s own PC may be configured to alert the user when it receives the email message from the ISP. However, many users log in only periodically to check for email messages. Thus, if an important email message arrives while the user is not logged in or is away from his PC terminal, the user will not be aware of this. 
     SUMMARY OF THE DESCRIPTION 
     Methods and apparatuses for processing electronic messages are described herein. In one aspect of an exemplary embodiment of the invention, for an outgoing message addressed to a mail address (e.g., an Internet email address) of a recipient, the mail client of a sender determines whether there is an alternative messaging system (e.g., an instant messaging system or a chat system) available to the mail address of the recipient. If there is an alternative messaging system available, the mail client determines whether the recipient&#39;s alternative messaging system is online. If so, the mail client sends the mail message to the recipient via the alternative messaging system. Otherwise, the mail client sends the message via a normal mail system. 
     In one aspect of an exemplary embodiment of the invention, when an incoming message is received at an alternative messaging system of a recipient, such as an instant messaging (IM) client, the message is examined whether the message is a mail message. If it is determined that the message is a mail message, the message is then forwarded to the corresponding mail client of the recipient and displayed as an ordinary mail message as if it is received from the corresponding mail server. 
     According to yet another aspect of an exemplary embodiment of the invention, when a mail client is launched, it registers with an alternative messaging client, such as an IM client. The alternative messaging client then advertises in its associated community that it is capable of processing mail messages. 
     According to yet another aspect of an exemplary embodiment of the invention, an alternative messaging server, such as an IM server, receives a message from a first messaging client of a first user, which is sent by a first mail client of the first user. The first mail client is communicatively coupled to the first messaging client of the first user. In response to the message, the alternative messaging server substantially instantly sends the message to a second messaging client of a second user, which is communicatively coupled to a second mail client of the second user. The message is then forwarded from the second messaging client to the second mail client and the second mail client processes the message as an ordinary mail message as if it is received from the first mail client of the first user via a mail server. 
     The present invention also discloses machine readable media which may be executed by a processor to perform the above processes. Other features of the present invention will be apparent from the accompanying drawings and from the detailed description which follows. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention is illustrated by way of example and not limitation in the figures of the accompanying drawings in which like references indicate similar elements. 
         FIG. 1  is a block diagram of a network of computer systems in which electronic messages may be processed, according to one embodiment of the invention. 
         FIG. 2A  is a block diagram illustrating an exemplary system for processing electronic messages, according to one embodiment of the invention. 
         FIG. 2B  is a block diagram illustrating an exemplary system for processing electronic messages, according to an alternative embodiment of the invention. 
         FIG. 2C  is a block diagram illustrating an exemplary mail client and an alternative delivery client according to one embodiment of the invention. 
         FIG. 3  is a flow diagram illustrating an exemplary process for processing electronic messages, according to one embodiment of the invention. 
         FIG. 4  is a flow diagram illustrating an exemplary process for processing electronic messages, according to another embodiment of the invention. 
         FIG. 5  is a flow diagram illustrating an exemplary process for processing electronic messages, according to yet another embodiment of the invention. 
         FIG. 6  is a block diagram illustrating an exemplary system for processing electronic messages, according to another embodiment of the invention. 
         FIG. 7  is a block diagram of a data processing system which may be used to process electronic messages, in accordance with one embodiment of the invention. 
     
    
    
     DETAILED DESCRIPTION 
     Method and apparatus for processing electronic messages are described herein. In the following description, numerous details are set forth to provide a more thorough explanation of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the present invention. 
     Some portions of the detailed descriptions which follow are presented in terms of algorithms and symbolic representations of operations on data bits within a computer memory. These algorithmic descriptions and representations are the means used by those skilled in the data processing arts to most effectively convey the substance of their work to others skilled in the art. An algorithm is here, and generally, conceived to be a self-consistent sequence of steps leading to a desired result. The steps are those requiring physical manipulations of physical quantities. Usually, though not necessarily, these quantities take the form of electrical or magnetic signals capable of being stored, transferred, combined, compared, and otherwise manipulated. It has proven convenient at times, principally for reasons of common usage, to refer to these signals as bits, values, elements, symbols, characters, terms, numbers, or the like. 
     It should be borne in mind, however, that all of these and similar terms are to be associated with the appropriate physical quantities and are merely convenient labels applied to these quantities. Unless specifically stated otherwise as apparent from the following discussion, it is appreciated that throughout the description, discussions utilizing terms such as “processing” or “computing” or “calculating” or “determining” or “displaying” or the like, refer to the action and processes of a computer system, or similar electronic computing device, that manipulates and transforms data represented as physical (electronic) quantities within the computer system&#39;s registers and memories into other data similarly represented as physical quantities within the computer system memories or registers or other such information storage, transmission or display devices. 
     The present invention also relates to apparatus for performing the operations herein. This apparatus may be specially constructed for the required purposes, or it may comprise a general purpose computer selectively activated or reconfigured by a computer program stored in the computer. Such a computer program may be stored in a computer readable storage medium, such as, but is not limited to, any type of disk including floppy disks, optical disks. CD-ROMs, and magnetic-optical disks, read-only memories (ROMs), random access memories (RAMs), EPROMs, EEPROMs, magnetic or optical cards, or any type of media suitable for storing electronic instructions, and each coupled to a computer system bus. 
     The algorithms and displays presented herein are not inherently related to any particular computer or other apparatus. Various general purpose systems may be used with programs in accordance with the teachings herein, or it may prove convenient to construct more specialized apparatus to perform the required method steps. The required structure for a variety of these systems will appear from the description below. In addition, the present invention is not described with reference to any particular programming language. It will be appreciated that a variety of programming languages may be used to implement the teachings of the invention as described herein. 
     A machine-readable medium includes any mechanism for storing or transmitting information in a form readable by a machine (e.g., a computer). For example, a machine-readable medium includes read only memory (“ROM”); random access memory (“RAM”); magnetic disk storage media; optical storage media; flash memory devices; electrical, optical, acoustical or other form of propagated signals (e.g., carrier waves, infrared signals, digital signals, etc.); etc. 
       FIG. 1  is a diagram of a network of computer systems in which an email may be processed via an alternative message delivery system other than an email system, according to one embodiment of the present invention. As shown in  FIG. 1 , a network  100  includes a number of client computer systems that are coupled together through an Internet  122 . It will be appreciated that the term “Internet” refers to a network of networks. Such networks may use a variety of protocols for exchange of information, such as TCP/IP, ATM, SNA, SDI, etc. The physical connections of the Internet and the protocols and communication procedures of the Internet are well known to those in the art. It will be also appreciated that such system may be implemented in an Intranet within an organization. 
     Access to the Internet  122  is typically provided by Internet service providers (ISPs), such as the ISP  124 , and the ISP  126 . Users on client systems, such as the client computer systems  102 ,  104 ,  118 , and  120 , generally obtain access to the Internet through Internet service providers, such as ISPs  124  and  126 . Access to the Internet may facilitate transfer of information (e.g., email, text files, media files, etc.) between two or more digital processing systems, such as the client computer systems  102 ,  104 ,  118 , and  120  and/or a Web server system  128 . For example, one or more of the client computer systems  102 ,  104 ,  118 , and  120  and/or the Web server  128  may provide document presentations (e.g., a Web page) to another one or more of the client computer systems  102 ,  104 ,  118 , and  120  and/or Web server  128 . For example, in one embodiment of the invention, one or more client computer systems  102 ,  104 ,  118 , and  120  may request to access a document that may be stored at a remote location, such as the Web server  128 . In the case of remote storage, the data may be transferred as a file (e.g., download) and then displayed (e.g., in a window of a browser) after transferring the file. In another embodiment, the document presentation may be stored locally at the client computer systems  102 ,  104 ,  118 , and/or  120 . In the case of local storage, the client system may retrieve and display the document via an application, such as a word processing application. Without requiring a network connection. 
     The Web server  128  typically includes at least one computer system to operate with one or more data communication protocols, such as the protocols of the World Wide Web, and as such, is typically coupled to the Internet  122 . Optionally, the Web server  128  may be part of an ISP which may provide access to the Internet and/or other network(s) for client computer systems. The client computer systems  102 ,  104 ,  118 , and  120  may each, with appropriate Web browsing software, access data, such as HTML document (e.g., Web pages), which may be provided by the Web server  128 . 
     The ISP  124  provides Internet connectivity to the client computer system  102  via a modem interface  106 , which may be considered as part of the client computer system  102 . The client computer systems  102 ,  104 ,  118 , and  120  may be a conventional data processing system, such as a Power Mac G5 or iMac computer available from Apple Computer, Inc., a “network” computer, a handheld/portable computer, a cell phone with data processing capabilities, a Web TV system, or other types of digital processing systems (e.g., a personal digital assistant (PDA)). 
     Similarly, the ISP  126  provides Internet connectivity for the client computer systems  102 ,  104 ,  118 , and  120 . However, as depicted in  FIG. 1 , such connectivity may vary between various client computer systems, such as the client computer systems  102 ,  104 ,  118 , and  120 . For example, as shown in  FIG. 1 , the client computer system  104  is coupled to the ISP  126  through a modem interface  108 , while the client computer systems  118  and  120  are part of a local area network (LAN). The interfaces  106  and  108 , shown as modems  106  and  108 , respectively, may represent an analog modem, an ISDN modem, a DSL modem, a cable modem, a wireless interface, or other interface for coupling a digital processing system, such as a client computer system, to another digital processing system. The client computer systems  118  and  120  are coupled to a LAN bus  112  through network interfaces  114  and  116 , respectively. The network interface  114  and  116  may be an Ethernet-type, asynchronous transfer mode (ATM), or other type of network interface. The LAN bus is also coupled to a gateway digital processing system  110 , which may provide firewall and other Internet-related services for a LAN. The gateway digital processing system  110 , in turn, is coupled to the ISP  126  to provide Internet connectivity to the client computer systems  118  and  120 . The gateway digital processing system  110  may, for example, include a conventional server computer system. Similarly, the Web server  128  may, for example, include a conventional server computer system. 
     Client computers  102 ,  104 ,  118 , and  120  may be able to send and receive email messages from each other. The email systems used by client computers  102 ,  104 ,  118 , and  120  may be proprietary email systems, such as IBM Lotus Notes. Alternatively, the email systems used by the client computers may be standard email systems, such as email systems using POP3 (post office protocol), SMTP (simple mail transport protocol), or IMAP (Internet message access protocol) protocols. According to one embodiment, the email client running at the client computers  102 ,  104 ,  118 , and  120  may determine whether there is an alternative message delivery mechanism, such as, for example, instant messaging (IM) system, to deliver the email message quicker. If the sender&#39;s email client determines that there is an alternative (e.g., a better alternative) available, the email client may interact with an application of the alternative delivery mechanism. The alternative delivery mechanism may deliver the email message to the recipient via the alternative delivery system, instead of going through the normal email server which routes the email message (via one or more routing servers) to the recipient&#39;s email server, and thereafter, the recipient&#39;s email server forwards the message to the recipient. 
     According to another embodiment, the alternative delivery mechanism, such as an IM system, may be able to detect whether the counterpart application of the recipient is enabled (e.g., online). The email client of the sender may interrogate the alternative delivery system to determine the status of the recipient&#39;s counterpart and its capability. The email client of the sender may only transmit the email message to the alternative delivery system if the alternative delivery system of the recipient is active (e.g., online) and able to receive such email messages. Otherwise, the email client of the sender may delivery the ail message through a normal email server. 
     According to one embodiment, in order to distinguish the email message from other messages delivered by the alternative delivery system, the email message may be tagged with an identification indicating the message being delivered is an email message and repackaged in a format compatible with the message requirement of the alternative delivery system. On the other side, when a recipient&#39;s counterpart alternative delivery system (e.g., IM client) receives the message, the message may be examined (via the tagged identification) to determine whether the message is an email message. If the message is an email message, the recipient&#39;s counterpart may reroute the message to the email client of the recipient. In one embodiment, either the alternative delivery system or the email client repackages the message as an ordinary email message and the email client displays the message as if it is received from the corresponding email server. Such actions are performed transparently to a user of the recipient and the user does not know whether the email message may be received via the alternative delivery system. 
       FIG. 2A  is a block diagram of an exemplary message processing system according to one embodiment of the invention. In one embodiment, exemplary system  200  includes clients  201  and  203  communicating with each other over a network  202 . Network  202  may be an Internet, an Intranet, or a wireless network. Typically, client  201  may communicate with client  203  via an email system including mail clients  205  and  211 , mail servers  207  and  209 , and one or more routing servers  208  within the network  202 . Mail servers  207  and  209  may use mail protocols, such as POP3, SMTP, or IMAP protocols, to process mail messages. A typical mail server may include an SMTP server for handling outgoing mail messages and a POP3 server for handling incoming mail messages. Alternatively, mail servers  207  and  209  may be proprietary mail servers provided by the same or different vendors. IM clients  204  and  210  may communicate with each other using a variety of communication protocols, such as, for example, proprietary protocols or the instant messaging and presence protocol proposed by the IETF (Internet Engineering Task Force). 
     In addition, clients  201  and  203  may be separately and independently running an alternatively message delivery system, such as, for example, an instant messaging (IM) system. In our fast-paced world, sometimes even the rapid response of email is not fast enough. A user has no way of knowing if the person the user is sending email to is online at that particular moment or not. Also, the email sending through the network may be delayed by one or more routing servers. As a result, more and more alternative message delivery systems, such as instant messaging, are getting more popular. A typical IM system may include IM clients  204  and  210  running at client  201  and  203  respectively. IM clients  204  and  210  may communicate with IM server  206  shared with IM clients  204  and  210 . 
     Instant messaging allows a user to maintain a list of people that the user wishes to interact with. A user may send messages to any of the people in the list, also referred to as a buddy list or contact list, as long as that person is online. Sending a message opens up a small window where the user and its friend can type in messages that both can see. Most of the popular instant messaging programs, such as AOL&#39;s AIM, or IM from Yahoo, provide a variety of features, such as swapping instant messages, chat, Web links, images, sounds, and files, and others (e.g., talk and streaming content). After the initial registration with the IM server  206  through paths  212  and  213 , IM server  206  allows the message to be transmitted to the intended recipient without having the message queued or delayed by a local mail server, as typically required by the conventional mail delivery mechanism. In addition, some IM systems allow IM clients  204  and  210  to directly communicate with each other (through path  214 ) without involving IM server  206 , using in part of the respective IP address and a port assigned to the services. As a result, messages exchanged between clients  204  and  210  are delivered in a faster manner. 
     According to one embodiment, IM clients  204  and  210  may interact with mail clients  205  and  211  respectively, such that mail messages of mail clients  205  and  211  may be delivered or received via the IM clients  204  and  210  utilizing the advanced features of the IM system, which will be described in details further below. In one embodiment, when mail client  205  is launched and initialized, mail client  205  may register, via path  215 , with IM client  204  to enable mail client  205  to transmit and receive mail messages via IM client  204 . After mail client  205  has registered with IM client  204 , IM client  204  may broadcast or advertise, via IM server  206 , in the IM community that IM client  204  is capable of handling mail messages. Other members of the IM community, such as IM client  210 , receives such advertisement and may sends further mail messages to IM client  204  subsequently. 
     Similarly, when mail client  211  is launched and initialized, mail client  211  may register, via path  216 , with IM client  210  to enable mail client  211  to transmit and receive mail messages via IM client  210 . After mail client  211  has registered with IM client  210 , IM client  211  may also broadcast or advertise, via IM server  206 , in the IM community that IM client  210  is capable of handling mail messages (e.g., the IM client  210  is “online”). Thereafter, mail clients  205  and  211  may exchange mail messages via IM clients  204  and  210  respectively. 
     For example, according to one embodiment, when mail client  205  receives a mail message from a user addressed to mail client  211  of a recipient, mail client  205  determines, without involving corresponding mail server  207 , whether there is an alternative messaging system, such as IM client  204 , available. The determination may be performed based on whether mail client  205  has registered with client  204  successfully. If there is no alternative messaging system available, mail client  205  may fall back to its mail server  207  to handle the incoming and outgoing mail messages. In one embodiment, such determination may be performed based on whether the alternative messaging system is installed or whether mail client  205  fails to register with the alternative messaging system, such as IM client  204 , using one of the aforementioned techniques. 
     If it is determined that there is an alternative messaging system available, according to one embodiment, mail client  205  may, via alternative messaging client  204  (e.g., IM client), determine whether the recipient&#39;s alternative messaging counterpart, such as alternative messaging client  210  (e.g., IM client), is activated (e.g., online). If the recipient&#39;s alternative messaging client is not activated (e.g., offline), mail client  205  may fall back to its mail server  207  to handle the mail messages. 
     If it is determined that the recipient&#39;s alternative messaging counterpart is activated, mail client  205  may determine, via alternative messaging system  204 , whether the recipient alternative messaging counterpart (e.g., alternative messaging system  210 ) is capable of handling mail messages. The determination may be performed based on whether the recipient&#39;s mail client  211  has successfully registered with its alternative messaging system  210 , which advertises such capability in the associated community, using one of the aforementioned techniques. If it is determined that the recipient&#39;s alternative messaging counterpart is unable to handle mail messages, mail client  205  may fall back to its mail server  207  to handle the mail messages. 
     If the recipient&#39;s alternative messaging system is able to handle mail messages, according to one embodiment, mail client  205  may optionally tag an identification with the mail message to indicate that the message being sent is a mail message. Alternatively, according to another embodiment, the tagging may be performed by alternative messaging client  204 . Thereafter, mail client  205  transmits the mail message to alternative messaging client  204  where the mail message may be repackaged in a format compatible with the alternative messaging system (e.g., an IM message packet). Alternatively, the mail message may be repackaged by mail client  205 . Furthermore, if the message is routed by the alternative messaging server  206 , the message may be repackaged by the server  206 . The mail message is then sent to the recipient&#39;s alternative messaging counterpart  210  over network  202 , directly via path  214  or indirectly via server  206 . 
     When the recipient&#39;s alternative messaging system, such as IM client  210  receives the message transmitted through either indirectly through server  206  or directly through path  214 , according to one embodiment, IM client  210  examines the message packets to determine whether the message is an email message. In one embodiment, IM client  210  may examine the identification tagged with the message to determine whether the message is an email message. If the message is determined to be an ordinary IM message, the message is displayed in a display of the IM client  210 . 
     If the message is determined to be an email message (or a message for other applications), the IM client  210  may reroute the message to corresponding mail client  211 . The message received, which may be IM packets, may be repackaged as email messages by mail client  211  and displayed in a display, such as an Inbox, of mail client  211  as if it is received from the corresponding mail server  209 . Alternatively, the repackaging may be performed by IM client  210 . Such actions are performed transparently to a user of client  203 . That is, the user of client  203  does not know whether the message displayed may be transmitted over through an alternative messaging system. Once IM client  210  turns over the message to mail client  211  successfully, IM client  210  may return a success status to IM client  204  of the sender. As a result, client  201  (e.g., the sender) may substantial instantly receive a confirmation of an arrival of the message at client  203 . 
     In addition, when IM client  210  receives the message, IM client  210  may determine whether mail client  211  is running and optionally has logged onto the corresponding server  209 . If IM client  210  determines that mail client  211  is not running, IM client  210  may return a failure status to IM client  204  of sender  201 . In which case, client  201  may fall back to mail client  205  to resend the message to mail server  207  which forwards the message to mail server  209  of the recipient. Alternatively, if IM client  210  determines that mail client  211  is not running, IM client  210  may attempt to launch mail client  211  and optionally prompt the corresponding user to log in. Furthermore, if IM client  210  determines that mail client  211  is not running, IM client  210  may simply store the message at a storage (e.g., a hard drive) of the recipient  203 . The stored message may be retrieved and displayed when the user launches his or her email client  211 . Further, IM client  210  may just display a dialog box at a desktop of recipient  203  indicating a new message has arrived, without involving mail client  211 . The above options may be configurable through a user interface of recipient  203 , such as user preference settings. Other configurations may exist. 
     In one embodiment, IM clients  204  and mail client  205  may operate independently to each other (e.g., separate applications). That is, client  201  having IM client  204  and mail client  205  installed may not be related to IM server  206 . Alternatively, IM clients  204  and mail client  205  may be implemented within the same application or a plugged-in application with respect to each other. Furthermore, the mail system (e.g., mail client  205  and mail server  207 ) of client  201  may be a different mail system with respect to the mail system (e.g., mail client  211  and mail server  209 ) of client  203 . 
     Note that the above techniques are not limited to a mail system with an IM system. It will be appreciated that other applications capable of interacting with another application may register with an IM system to transmit and receive data with another application via the IM system. It will be appreciated that the alternative messaging system may not be limited to an IM system, any messaging system may utilize the above described techniques to provide an alternative message routing system to an application capable of communicating with another application, such as an electronic organizer or a Web service application, etc. 
     Furthermore, clients  201  and  203  are described only for the purposes of a sender or a recipient. Alternative messaging delivery client  204  and mail client  205  are controlled by client  201 . However, alternative messaging delivery client  204  and mail client  205  are not limited to be within the same platform. According to one embodiment of the invention, alternative messaging delivery client  204  and mail client  205  may be located at different and separate platforms communicating with each other and controlled by client  201  (e.g., a sender or a recipient). Similarly, alternative messaging delivery client  210  and mail client  211  may be located at different and separate platforms communicating with each other and controlled by client  203  (e.g., a sender or a recipient), as illustrated in  FIG. 2B . 
       FIG. 2B  is a block diagram illustrating an exemplary message processing system according to an alternative embodiment of the invention. Referring to  FIG. 2B , alternatively message delivery client  204  and mail client  205  are located within different platforms (e.g., platform  1  and  2 ) respectively. Platforms  1  and  2  are controlled by a sender or a recipient. Similarly, alternatively message delivery client  210  and mail client  211  are located within different platforms (e.g., platform  3  and  4 ) respectively. Platforms  3  and  4  are controlled by a sender or a recipient. Alternatively message delivery clients  204  and  210  and mail clients  205  and  211  communicate with each other via communication mediums  215  and  216  respectively. Communication mediums  215  and  216  may be a wired communication medium, such as, for example, a local network area (LAN) connection or a modem connection. Alternatively, communication medium  215  may be a wireless connection, such as, for example, an infrared or a home networking connection (e.g., IEEE 802.xx, such as Bluetooth or WiFi). 
     For example, platform  1  may represent a desktop computer having a network interface to network  202  while platform  2  may be a handheld device, such as, a cellular phone, a Palm pilot, a two-way pager, or an email platform (e.g., a BlackBerry platform from Research In Motion of Waterloo, ON), etc. When a sender represented by platforms  1  and  2  desires to send a mail message to a recipient represented by platforms  3  and  4 , mail client  205  communicates with alternative message delivery client  204  to determine whether alternative message delivery client  204  is available and able to handle mail message via communication medium  215 . If alternative message delivery client  204  is available and able to handle mail message, mail client  205  transmits the mail message from platform  2  to platform  1  via communication medium  215 . Alternative message delivery client  204  then sends the mail message via the associated messaging system to the corresponding alternative message delivery client  210  of platform  3 , which is controlled by the recipient. Thereafter, alternative message delivery client  210  of platform  3  forwards the received message to mail client  211  of platform  4 , which is also controlled by the recipient, using one of the aforementioned techniques. 
       FIG. 2C  is a block diagram illustrating an exemplary client having a mail client and an alternative delivery client communicatively coupled to each other according to one embodiment of the invention. The exemplary client  250  may represent clients  201  and  203  of  FIG. 2A . In one embodiment, exemplary client  250  includes a mail client  252  communicatively coupled to an alternative delivery client  251 . Similar to a conventional mail client, mail client  252  includes a user interface  261 , a mail processing module  258 , and a communication interface  259 . User interface  257  may include an inbox to display incoming messages and an editor to allow a user to prepare an outgoing message. Mail processing module may communicate with a mail server (not shown) via communication interface  252  to transport and to receive outgoing and incoming messages. In addition, according to one embodiment, mail client further includes an inter-process module  257  that is able to communicate with another application, such as, for example, an IM client or an electronic organizer, etc. 
     In one embodiment, alternative delivery client  251  includes a user interface  260 , an inter-process module  253 , a transmitting module  254 , a receiving module  255 , and a communication interface  256 . Transmitting module  254  is responsible for transmitting an outgoing message in accordance with a communication protocol to a destination via communication interface  256  and network  263 . Receiving module  255  is responsible for receiving an incoming message from an originator via communication interface  256  and network  263 . User interface  260  may include a display window to display an incoming message and an editor to allow a user to prepare an outgoing message. Inter-process module  253  is responsible for handling traffic between user interface  260  and transmitting module  254  and receiving module  255 . In addition, inter-process module further handles communication between client  251  and mail client  252 . 
     User interfaces  260  and  261  may be separate user interfaces for handling different messages respectively. According to one embodiment, user interfaces  260  and  261  may be integrated as a unified user interface  262  to handle both mail messages and non-mail messages. For example, unified user interface  262  may include a window as an inbox to display both incoming mail messages and other non-mail messages, such as IM messages. Alternatively, alternative delivery user interface  260  may be a stand-alone user interface, while mail client  252  includes unified user interface  262  that includes the alternative delivery user interface  260 . Further detailed information concerning the unified user interface can be found in a co-pending U.S. patent application Ser. No. ______, by Stephen O. Lemay et al., having an applicant&#39;s reference of 4860.P3077, entitled “Unified Use Interface for Instant Messaging and Email”, filed Dec. 19, 2003, and assigned to a common assignee of the present application. The above-identified U.S. patent application is hereby incorporated by reference. 
     According to one embodiment, when mail client  252  is launched, inter-process module  257  may determine whether an alternative delivery mechanism is available. In one embodiment, the alternative delivery mechanisms, including the associated recipient&#39;s addresses, may be listed within an address book of mail client  252 . If an alternative delivery mechanism is available, mail client  252  may register with the alternative delivery client  251  to inform alternative delivery client  251  that mail client  252  is up and running. If alternative delivery client  251  is not running or active, mail client  252  may optionally launch alternative delivery client  251  and register with alternative delivery client  251  thereafter. Once the mail client  252  and the alternative delivery client  251  have established a connection, the alternative delivery client  251  may advertise in its respective community that it can handle messages associated with the mail client  252 . 
     In one embodiment, when a sender prepares an outgoing message using user interface  261 , user interface  261  transmits the outgoing message to inter-process module  257 . Inter-process module  257  determines whether client  250  has an alternative delivery mechanism. In one embodiment, an alternative delivery mechanism may be identified through a lookup operation in an address book associated with mail client  252 . If inter-process module  257  determines that an alternative delivery mechanism exists, inter-process module  257  may communicate with the associated alternative delivery client  251  via the previously established inter-process connection. Alternatively, inter-process module  257  may dynamically launch the alternative delivery client  251  and establish such an inter-process connection. 
     If the alternative delivery client  251  is up and running, inter-process module  257  of mail client  252  may interrogate with alternative delivery client  251  via respective inter-process module  253  to determine whether an intended recipient&#39;s corresponding alternative delivery mechanism is online and whether the intended recipient&#39;s alternative delivery mechanism is capable of receiving a mail message (e.g., whether it is able to redirect an incoming message to a mail client of the recipient). If it is determined that the recipient&#39;s alternative delivery mechanism is online and capable of handling mail massages, inter-process module  257  transmits the outgoing mail message to the alternative delivery client  251 . Otherwise, inter-process module  257  transmits the outgoing mail message to mail processing module  258  and the mail processing module  258  processes the outgoing mail message as an ordinary mail message. 
     When inter-process module  253  of the alternative delivery client  251  receives the outgoing mail message received from mail client  252 , according to one embodiment, inter-process module  253  transmits the message to transmitting module  254 . Transmitting module  254  then delivers the message to the intended recipient via communication interface  256  and network  263 , as if the message is an ordinary message associated with the alternative delivery client  251 . In addition, inter-process module  253  or the transmitting module  254  may repackage the mail message into a message compatible with a communication protocol associated with the alternative delivery mechanism. Furthermore, inter-process module  253  may further tag the message to indicate that the message is a mail message before transmitting the message to transmitting module  254 . Alternatively, the tagging and repackaging may be performed by the mail client  252 . 
     For the purposes of illustration, it is assumed that client  250  is now representing a recipient to receive a mail message transmitted via an alternative delivery mechanism from a sender. According to one embodiment, the message is received by receiving module  255  via communication interface  256 . The receiving module  255  transmits the message to inter-process module  253 . The inter-process module  253  may examine the message to determine whether the message is a mail message by, for example, examining the identification or signature tagged by the sender. If the message is determined to be a mail message, inter-process module  253  may transmits the message to inter-process module of mail client  252  via a inter-process connection. Otherwise, inter-process module  253  may transmit the message to the corresponding user interface  260  and user interface  260  displays the message as an ordinary message associated with the alternative delivery client  251 . 
     When inter-process module  257  of mail client  252  receives the message from the alternative delivery client  251 , inter-process module  257  transmits the message to the corresponding user interface  261  where the message is displayed as an ordinary mail message. The above operations may be performed transparently to a user of mail client  252 . In addition, inter-process module  257  may further perform repackaging the message into a mail message, as well as other operations, such as, for example, stripping off the tagged identification, before transmitting the message to user interface  261 . The repackaging or the like operations may be performed by the alternative delivery client  251 , such as inter-process module  253  or receiving module  255 . 
     Furthermore, if user interfaces  260  and  261  are implemented as unified user interface  262 , the message may be directly delivered to the unified user interface  262  by inter-process module  253 , where the unified user interface  262  may examine the message (e.g., examining the tagged identification) and display the message accordingly. Other operations apparent to those with ordinary skill in the art may be performed. 
     As described above, client  250  may represent a sender or a recipient. Alternative delivery client  251  and mail client  252  are not required to be in the same platform. It will be appreciated that alternative delivery client  251  and mail client  252  may be located within different platforms controlled by a sender or a recipient, as illustrated in  FIG. 2B . Other configurations may exist. 
       FIG. 3  is a flow diagram illustrating an exemplary process for registering a mail client with an alternative message delivery system, according to one embodiment of the invention. Exemplary process  300  may be performed by a processing logic that may comprise hardware (circuitry, dedicated logic, etc.), software (such as is run on a general purpose computer system or a dedicated machine), or a combination of both. In one embodiment, exemplary process  300  includes launching an application of a client, the application capable of transmitting and receiving data with another application, determining whether the client has an instant messaging (IM) capability, and registering with the client&#39;s IM capability, such that the application is able to transmit and receive data, via the client&#39;s IM capability, with another application over a network. 
     Referring to  FIG. 3 , at block  301 , when a mail client, such as mail client  205 , is launched and optionally logs into a mail server (e.g., mail server  207 ), at block  302 , the mail client tries to establish a connection with at least one of one or more alternative message delivery systems, such as IM system having IM client  204  and IM server  206 . If the respective alternatively message delivery system is not activated (block  303 ), at block  307 , mail client may optionally launch an application associated with the alternative messaging system. If the alternative message application cannot be launched (block  308 ), at block  309 , the mail client may fall back to the mail server to handle the incoming and outgoing mail messages. 
     Once the alternative messaging system is activated, at block  304 , the mail client may register with the alternative messaging system. After the mail client has registered with the alternative message system, at block  305 , the alternative message client may broadcast or advertise its capability to handle mail messages to a community associated with the alternative messaging system, such as IM messaging community. Thereafter, at block  306 , the mail client may process incoming and outgoing mail messages via the registered alternative messaging system. Other operations apparent to one with ordinary skill in the art may be included. 
       FIG. 4  is a flow diagram illustrating an exemplary process for delivering an electronic message according to one embodiment of the invention. Exemplary process  400  may be performed by a processing logic that may comprise hardware (circuitry, dedicated logic, etc.), software (such as is run on a general purpose computer system or a dedicated machine), or a combination of both. In one embodiment, exemplary process  400  includes receiving, at a mail client, a mail message addressed to a mail address of a recipient at a remote site, determining, at the mail client, whether there is an alternative delivery mechanism available for the recipient, delivering the mail message to the recipient via the alternative delivery mechanism, if the alternative delivery mechanism is available, and delivering the mail message to a mail server which forwards the mail message to the recipient, if the alternative delivery mechanism is unavailable. 
     Referring to  FIG. 4 , when a mail client (e.g., mail client  205 ) receives an outgoing mail message addressed to a mail address of a recipient (block  401 ), at block  402 , the mail client determines whether there is an alternative messaging system (e.g., IM client  204 ) available for the mail address of the recipient. In one embodiment, the mail client determines the alternative delivery address (e.g., IM address) of the recipient based on the mail address of the recipient. The mail client may look up in a database, such as an address book of the sender (e.g., client  201 ) to search for an alternative address (e.g., IM address) associated with the mail address of the recipient. If there is no alternative messaging system available (block  403 ), at block  404 , the mail client delivers the message to a corresponding mail server (e.g., mail server  207 ), which forwards the message to the recipient via an ordinary mail system. 
     If there is an alternative messaging system available for the mail address of the recipient, at block  405 , mail client or the alternative messaging client may determine whether the recipient&#39;s alternative messaging system is online (e.g., whether the recipient IM client is running). If the recipient&#39;s alternative messaging system is not running, the mail client may fall back to the mail server to process the mail message (block  404 ). 
     If the recipient&#39;s alternative messaging system is online (e.g., the IM client  210  is running), at block  406 , the mail client or the alternative messaging client may determine whether the recipient&#39;s alternative messaging client can handle mail messages. In one embodiment, the determination may be performed based on whether the recipient&#39;s mail client has registered with its alternative messaging client and the alternative messaging client has advertised such capability in the associated community. If the recipient&#39;s alternative messaging client does not have such capability, the mail client may fall back to the mail server to process the mail message (block  404 ). 
     If the recipient&#39;s alternative messaging system has a capability to handle mail messages, at block  407 , the message may be tagged with an identification to indicate that the message is an email message rather than an ordinary message associated with the alternative messaging system. In addition, according to one embodiment, the message may be repackaged as or converted to a message conforming to a protocol of the alternative messaging system before being transmitted over by the alternative messaging system at block  408 . 
     At block  409 , the mail client may examine the return status received from the alternative messaging system to determine whether the delivery is successfully. If the delivery is unsuccessful, the mail client may fall back to the mail server to process the mail message again (block  404 ). Other operations apparent to one with ordinary skill in the art may be included. 
       FIG. 5  is a block diagram illustrating an exemplary process for handling incoming electronic message according to one embodiment of the invention. Exemplary process  500  may be performed by a processing logic that may comprise hardware (circuitry, dedicated logic, etc.), software (such as is run on a general purpose computer system or a dedicated machine), or a combination of both. In one embodiment, exemplary process  500  includes receiving a message at an instant messaging (IM) client from an originator over a network, the message received designated to an application communicably coupled to the IM client, determining, at the IM client, which application the message is designated to, and delivering the message to the designated application via an application programming interface (API). 
     Referring to  FIG. 5 , when an incoming message is received at a client via a non-mail messaging system of a recipient (block  501 ), such as an IM system, at block  502 , the non-mail messaging client determines whether the message is a mail message. In one embodiment, the determination is performed based on whether the incoming message is tagged with an identification indicating the message as a mail message. If the message is not a mail message (block  503 ), the message is delivered and displayed at a display of the non-mail messaging client at block  504  (e.g., the message is delivered in an instant messaging user interface). 
     If the message is determined to be a mail message, at block  505 , the non-mail messaging client determines whether the mail client of the recipient is running. If the corresponding mail client is running, at block  506 , the message is forwarded to the mail client and displayed at the mail client as if it is received through a mail system. In one embodiment, the message may be optionally repackaged as a mail message prior to being displayed at the mail client. Such operations are performed transparently to a user of the mail client. Thereafter, at block  507 , the mail client may return a success status to the sender via the non-mail messaging system. As a result, the sender may substantially instantly receive a confirmation of arrival of the message at the recipient. 
     If the corresponding mail client is not running (block  505 ), at block  508 , the non-mail messaging client may optionally attempt to launch the mail client. If the mail client is successfully launched (block  509 ), the message is then forwarded to the mail client to be displayed as a mail message at block  506  and thereafter return a success status to the sender at block  507 . Otherwise, at block  510 , a failure status is returned. Other operations apparent to one with ordinary skill in the art may be included. 
     According to one embodiment, exemplary system  200  of  FIG. 2A  is not limited to rerouting an email message via an alternative messaging system. It will be appreciated that the techniques may be applied to other applications capable of receiving data from a remote application. For example, a user with a mobile device may use exemplary system  200  to update his or her calendar or to schedule a meeting with someone. A traditional approach may rely on email system to perform such action. In a traditional approach, a user typical sends an email to a server (e.g., an email server or an electronic organizer) to update the calendar. Since the email system typically goes through one or more routing servers and may cause delay, the update may cause conflicts with other events, which the user has no way to know instantly. However, according to one embodiment, a user may use exemplary system  200  to send a message or a command to update his or her calendar through a better alternative messaging system. such as IM system. The message or command may be sent to the corresponding targeted application quicker and substantial instantly receive a confirmation of an arrival of the message or command. As a result, the user may instantly know whether the message has been received by the recipient and whether a conflict exists. 
       FIG. 6  is a block diagram illustrating an exemplary message processing system according to one embodiment of the invention. In this embodiment, third party applications  601  and  610  may utilize exemplary system  600  to send and receive messages or commands via an alternative messaging system (non-mail clients  602  and  609  and server  606 ) other than a mail system (mail clients  603  and  608 , and mail servers  604  and  607 , as well as the routing servers in between). According to one embodiment, third party application  601 , such as an electronic organizer, may use mail client  603  or non-mail client (e.g., IM client)  602  to update a recipient&#39;s counter part application  610 . Application  601  may perform the determination whether an alternative messaging system  602 , other than mail system  603 , is available, using techniques similar to those described above. Alternatively, application  601  may send and receive message through mail client  603  and mail client  603  performs such determination using one of the aforementioned techniques. 
     In addition, a local community network  611 , such as a peer-to-peer network may be coupled to the non-mail messaging client or the mail client, such that a message being sent or received may be processed by at least one of the peers in the community  611 . 
     Furthermore, the non-mail messaging system is not limited to a traditional IM system available to a wired network. It will be appreciated that other types of network, such as a wireless network (e.g., a cellular network or a home networking environment, such as an IEEE 802.xx network), may utilize the techniques described above. For example, network  605  may include a cellular network and application  601  may be an application running at a portable PDA (personal digital assistant) or a cellular phone capable of sending or receiving mail messages. In addition, application  601  may also be capable of receiving wireless instant messages, such as SMS (short message service) messages available in a cellular network to substantial instantly transmit a message to a recipient&#39;s counterpart, which forwards the message to its mail client and displays the message as a mail message in an Inbox of the recipient&#39;s mail. Other configurations apparent to one with ordinary skill in the art may exist. 
     According to one embodiment, more than one alternative delivery mechanisms, such as, for example, IM, wireless SMS (short message services), two-way paging system, or facsimile application, etc., may be available for the sender to select. The mail client may select from the multiple alternative delivery mechanisms a most appropriate delivery mechanism to deliver the mail message. In one embodiment, the mail client may select the most appropriate delivery mechanism based on an attribute of the mail message, the user configuration, or the user preferences. For example, the mail client may select the IM or cellular SMS services to deliver the message if it is determined that the message needs to be delivered in the fastest manner. Alternatively, the mail client may select a facsimile service to deliver the message if it is determined that the message needs to be sent in the most secure manner. The recipient&#39;s addresses or the fax numbers of the alternative delivery mechanisms may be stored in an address book of the sender. The mail client may perform a lookup operation in the address book to discover the multiple alternative delivery mechanisms. The mail client may interrogate the respective system to determine whether the recipient&#39;s counterpart application is online and has the capability to handle the message that is about to send. 
     As described above, non-mail messaging system client  609 , mail client  608 , and third party applications  610  are not required to be within the same platform. It will be appreciated that non-mail messaging system client  609 , mail client  608 , and third party applications  610  may be located within different platforms controlled by a sender or a recipient, as illustrated in  FIG. 2B . Other configurations may exist. 
       FIG. 7  is a block diagram of a digital processing system which may be used with one embodiment of the invention. For example, the system  700  shown in  FIG. 7  may be used as a client computer system (e.g., the client computer systems  102 ,  104 ,  118 , and/or  120  of  FIG. 1 ), a Web server system (e.g., the Web server system  128 ), or a conventional server system, etc. Furthermore, the digital processing system  700  may be used to perform one or more functions of an Internet service provider, such as the ISP  124  and  126 . 
     Note that while  FIG. 7  illustrates various components of a computer system, it is not intended to represent any particular architecture or manner of interconnecting the components, as such details are not germane to the present invention. It will also be appreciated that network computers, handheld computers, cell phones, and other data processing systems which have fewer components or perhaps more components may also be used with the present invention. The computer system of  FIG. 7  may, for example, be an Apple Macintosh computer or a IBM compatible PC. 
     As shown in  FIG. 7 , the computer system  700 , which is a form of a data processing system, includes a bus  702  which is coupled to a microprocessor  703  and a ROM  707 , a volatile RAM  705 , and anon-volatile memory  706 . The microprocessor  703 , which may be, for example, a PowerPC G4 or PowerPC G5 microprocessor from Motorola. Inc. or IBM, is coupled to cache memory  704  as shown in the example of  FIG. 7 . The bus  702  interconnects these various components together and also interconnects these components  703 ,  707 ,  705 , and  706  to a display controller and display device  708 , as well as to input/output (I/O) devices  710 , which may be mice, keyboards, modems, network interfaces, printers, and other devices which are well-known in the art. Typically, the input/output devices  710  are coupled to the system through input/output controllers  709 . The volatile RAM  705  is typically implemented as dynamic RAM (DRAM) which requires power continuously in order to refresh or maintain the data in the memory. The non-volatile memory  706  is typically a magnetic hard drive, a magnetic optical drive, an optical drive, or a DVD RAM or other type of memory system which maintains data even after power is removed from the system. Typically the non-volatile memory will also be a random access memory, although this is not required. While  FIG. 7  shows that the non-volatile memory is a local device coupled directly to the rest of the components in the data processing system, it will be appreciated that the present invention may utilize a non-volatile memory which is remote from the system, such as a network storage device which is coupled to the data processing system through a network interface such as a modem or Ethernet interface. The bus  702  may include one or more buses connected to each other through various bridges, controllers, and/or adapters, as is well-known in the art. In one embodiment, the I/O controller  709  includes a USB (Universal Serial Bus) adapter for controlling USB peripherals. Alternatively, I/O controller  709  may include an IEEE-1394 adapter, also known as FireWire adapter, for controlling FireWire devices. 
     Thus, a method and apparatus for processing electronic messages have been described. In the foregoing specification, the invention has been described with reference to specific exemplary embodiments thereof. It will be evident that various modifications may be made thereto without departing from the broader spirit and scope of the invention as set forth in the following claims. The specification and drawings are, accordingly, to be regarded in an illustrative sense rather than a restrictive sense.