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— | anti-spam_and_anti-virus_measures [2014/05/09 11:43] (current) – created - external edit 127.0.0.1 | ||
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+ | {{ : | ||
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+ | |||
+ | ---- | ||
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+ | ===== DNS Blacklists ===== | ||
+ | When mail arrives at our mailserver, our first line of defense is sendmail' | ||
+ | We have supplemented the DNSBL mechanism by some additional rules, like blocking mail where the sender address does not resolve to a valid internet address. | ||
+ | |||
+ | ---- | ||
+ | ===== MailScanner ===== | ||
+ | All mail, after passing the acceptence test, is processed through MailScanner, | ||
+ | |||
+ | - Process mail through SpamAssassin for spam tagging; | ||
+ | - Ordered List ItemProcess mail through the ClamAV and McAfee virusscanners; | ||
+ | - Ordered List ItemQuarantine mail reported to be infected by a virus, or mail containing dangerous attachments or dangerous html. | ||
+ | |||
+ | Note: as of 18 November 2003, our MailScanner configuration ads a header with the short summary of the virusscan: | ||
+ | |||
+ | **'' | ||
+ | '' | ||
+ | ** | ||
+ | |||
+ | for infected mails, or "Found to be clean" for uninfected mails. | ||
+ | |||
+ | ---- | ||
+ | ===== Quarantine ===== | ||
+ | If a virus or dangerous attachment is detected, you will receive a mail where the dangerous part has been stripped out and replaced by a virus warning like this one: | ||
+ | |||
+ | '' | ||
+ | |||
+ | ---- | ||
+ | |||
+ | '' | ||
+ | was believed to be infected by a virus and has been replaced by this warning | ||
+ | message.'' | ||
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