Reading incoming email To read email, a user needs an email program that will communicate with CSIM email server. Communication can be done using POP or IMAP protocol. IMAP should be prefered when possible as it offers a better flexibility, it allows to read users folders and not only the user's incoming mailbox located in the system files. In order to read incoming email, a user need to authenticate to CSIM email server. The user name is the standard user name valid for Unix and samba.
Normal password is subject to easy attacks by hackers.
Any user's email program can use normal password authentication. OPIE authentication is not limited to CSIM building. The advantage of OPIE authentication is that no modification of the email program is needed. Any user's email program can use OPIE one-time password authentication. Challenge authentication is called APOP for POP protocol and Cram-MD5 for IMAP protocol.