Security problem reported with Postfix

John Clancy john.clancy at
Thu Feb 10 08:34:29 GMT 2005

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Hi Folks,

I'm sure most people on the list who might use Postfix are already aware of
this but I thought I should probably post it anyway

21. Postfix IPv6 Unauthorized Mail Relay Vulnerability
BugTraq ID: 12445
Remote: Yes
Date Published: Feb 04 2005
Relevant URL:
Postfix is prone to a vulnerability that allows the application to be abused
as a mail relay.

Arbitrary mail may be sent to any MX host with an IPv6 address.  This could
be exploited by spammers or other malicious parties.

Postfix 2.1.3 is reported prone to this issue.  It is possible that other
versions are affected as well.


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