Recent reports indicate that spam is increasing again. I have been using Exim to filter spam for several years. Some recent tuning I have done has decreased the percent of spam that reaches my spam filters. This article provides a discussion of the techniques used and provides implementation examples. Spambots tend to be simple programs that don’t handle slow servers very well. Using a greylist is an effective method of blocking them as they usually don’t retry. My latest changes use delays to cause many spambots to abandon their attempt. Greylisting is used only for poorly configured servers that make it to the Recipient command.
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Email Policy
SysteMajik.com actively discourages Spam and email sent from incorrectly configured servers. A legitimate email from correctly configured servers should have little problem being delivered. We believe we are relatively compliant with RFC 2505 – Anti-Spam Recommendations for SMTP MTAs and other RFCs mentioned at the end of this document.
This article covers our policy implementation for incoming and outgoing email. These policies apply to all email destined to or originating from systemajik.com, toucantango.com, and other domains for which we may handle email.
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