The basic profile of A-NET's activity is the provision of services related to the construction and administration of computer networks. The A-NET offer includes branded computer equipment and the necessary office software. a-net | offer | contact | realizations | information | greylist | mail | ca | Bielsko | telecommunications | TV help Copyright © by A-NET 2006 - 2015

Selected projects: Industrie Maurizio Peruzzo POLOWAT Sp. z o . o. - design and commissioning of a wide area network based on IPSEC VPN TENiT Internet - administration of hosting servers Andersen Poland sp. Z oo - computer network and database server management BETONEX sp. Z o. O. - supplies of hardware and software, expansion of the computer network CEFEDRO - computer network management and database servers IMP Comfort sp. Z oo - design and commissioning of a wide area network based on IPSEC VPN BOLIX SA - administration of mail servers Hutchinson Polska sp. Z oo - design and commissioning of a secure subnet for wireless devices itvg.pl - technical implementation of the project KODG - domain positioning AGROPUNKT - computer network management and database servers LENS - technical implementation of the project TU INTER Polska SA Bielsko Biała Branch - design and implementation of a computer network a-net | offer | contact | realizations | information | greylist | mail | ca | Bielsko | telecommunications | TV help Copyright © by A-NET 2006 - 2015

Greylist filter The Greylist filter takes advantage of the fact that spammers, in most cases, use applications that do not act as mail servers to send spam. If an e-mail protected by this filter is sent to an e-mail from an unknown sender (or from a known sender, but has been sending e-mail from another server so far), such e-mail is rejected with an error code indicating temporary technical problems. A fully functional mail server will keep such a parcel in the queue and will try to resend it in a few to several minutes. If such an attempt takes place after a minimum of 5 minutes, the parcel will be accepted and the data set: sender's email / sender's IP / recipient's email saved in the database as correct (from the point of view of Greylist operation). Subsequent shipments to the recipient's email address from that sender's email / IP address will no longer be held. Applications used by spammers, sending spam massively - will not try to queue such mailings due to the unprofitable, very high costs (amount of resources) consumed by queuing. Spam will therefore be rejected and will not be sent to the recipient again. The estimated efficiency of the Greylist filter is very high - around 80% of spam will be stopped in this way. WARNING! A certain inconvenience for the users of this filter is the initial delay in the delivery of the package, if the sender or his IP address has not yet been recorded in the database. If the nature of the box application (e.g. on-line support) does not allow such delays, please notify your domain administrator. a-net | offer | contact | realizations | information | greylist | mail | ca | Bielsko | telecommunications | TV help Copyright © by A-NET 2006 - 2015