[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

Typical messages returned were like;

When sending e-mail out:
	<my domain #5.5.0 smtp;550-Message rejected because (my domain)
[] 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) [] 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

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,

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