FOSS for Life » Sendmail

Sendmail backup mx relay

Truong Anh Tuan — Mon, 27 Apr 2009 16:23:23 +0000

I have used sendmail for a number of years. We use it on our main mail server and on our backup mx servers.

Up until recently we simply allowed the backup mx servers to relay all mail to the domains they serve. Unfortunately spammers tend to target backup mx servers in the belief they are . . . → Read More: Sendmail backup mx relay

Sendmail’s Greet_Pause

Truong Anh Tuan — Mon, 24 Mar 2008 05:15:58 +0000

Slamming is a popular spammer tactic in which the spammer quickly fires off SMTP messages without waiting for responses from the receiving server. A poorly behaved MTA will then accept traffic from the spammer, instead of rejecting it as it should. But even well-behaved MTAs are affected because of the sheer volume of traffic with . . . → Read More: Sendmail’s Greet_Pause

Removing mails spam-scored over 10

Truong Anh Tuan — Tue, 16 Oct 2007 03:46:33 +0000

I am using SpamAssassin 3.1.x on Linux. Now, all mails with spam score over five (5) are marked as spams (so simple configuration). Further more, I would like to remove permanently all mails with score over ten (10).

Here is content of /etc/procmailrc to do that:

DROPPRIVS=yes MAX_SCORE=10.00 MIN_SCORE=5.00 :0fw | /usr/bin/spamc :0 * ^X-Spam-Status:.*score=\/[0-9\.]+ . . . → Read More: Removing mails spam-scored over 10