[Pkg-exim4-users] exim4 dnslists blocks all mail
Thijs Koetsier
lijsten at thijskoetsier.net
Mon Jul 9 19:06:53 UTC 2007
Hi everybody,
I'm using Exim4 on Debian Sarge.
Since today my mailserver began to block all e-mails in and out, claiming it
was relayed from blocked IP's in my dnslists-variable (located in
conf.d/acl/30_exim4-config_check_rcpt)
Typical messages returned were like;
When sending e-mail out:
<my domain #5.5.0 smtp;550-Message rejected because (my domain)
[000.000.000.000] is blacklisted at>
(at the zeros my originating IP# was filled in.)
When sending e-mail in from other domains such as hotmail.com:
Reporting-MTA: dns;bay0-omc2-s9.bay0.hotmail.com
Received-From-MTA: dns;BAY106-W13
Arrival-Date: Mon, 9 Jul 2007 11:44:32 -0700
Final-Recipient: rfc822;my-local at email.address
Action: failed
Status: 5.5.0
Diagnostic-Code: smtp;550-Message rejected because
(bay0-omc2-s9.bay0.hotmail.com) [65.54.246.145] is
550 blacklisted at list.dsbl.org see
In my exim4 logfiles, I indeed witnessed all e-mails being blocked for being
blacklisted at one of the hosts in my dnslists-variable.
Only after I replaced this value in the above mentioned file in;
dnslists =
(no servers listed at all)
mails were going in and out again (I know have an highly increased spamcount
ofcourse).
Adding back servers one by one only resulted in all e-mails bouncing due to
that specific server.
When all servers were listed, mails just bounced by all servers randomly.
This problem really freaks me out, so I hope it's something known.
Hope to hear from someone.
Kind regards,
Thijs
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