The anti-spam systems used by the university

[id : 270] [18/01/2017] [hits : 37286]

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On the university's mailservers several systems against the growing problem of unsolicited e-mail are implemented.

At the end of March 2007, the Computing Centre has brought into operation a hardware solution to combat the ever growing problem of unsolicited e-mail: IronPort(r). All messages that are sent to an address within the vub.ac.be or ulb.ac.be domain are checked for spam by IronPort(r).

This solution verifies two elements:

- the reliability of the mailserver that offers a message to the VUB/ULB mailservers
- the content and probability of spam of the message

If a message is offered to the university's mailservers by an (external) mailserver with a bad reputation, the message is rejected immediately, the probability that the message contains spam is as good as 100%. The sender will receive an error message in return.

If the reputation of the (external) mailserver is sufficiently high (which will be the case for most legitimate organizations and companies), the message will be awarded a spam value, based on the content of the message itself. Based on this value, the message will be tagged as "spam" or not. This "spam status" can then be used to filter out possible spammessages and put them aside, either on the central mailserver or in the mailprogram on your computer.

Peter Van Rossem - helpdesk@vub.ac.be

SpamAssassin(tm), the antispam software on the central mailserver, has been replaced by the end of March 2007 by the hardware solution IronPort.


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