From: Comfy Couch (no email)
Date: Wed Dec 01 2004 - 13:47:35 EST
>From: Victor Duchovni <>
>Reply-To:
>To:
>Subject: Re: delivery temporarily suspended: mail for DOMAIN.COM loops back
>to myself
>Date: Wed, 1 Dec 2004 13:24:59 -0500
>
>On Wed, Dec 01, 2004 at 06:15:44PM +0000, Comfy Couch wrote:
>
> > Theory:
> > My server used to be known as mxb1.biz.company.com, but I
> > disliked the "1" and so prefer to use "mxb.biz.company.com",
> > even though both A records still exist, and a bunch of customer
> > domains still refer to "mxb1" for now.
> > So Postfix receives the mail and normally just punts it along to the
> > primary server (the customer box). But if that customer box goes
> > down, then the Postfix servers try to send to the next hop - which
> > they don't realize is actually themselves.
>
>The theory is wrong. Postfix loop elimination is address based
>not name based. Make sure that inet_interfaces + proxy_interfaces
>includes all possible IP addresses that result from names listed in
>all MX records. Postfix prunes the MX list at and above the the lowest
>preference that resolves to one of its own addresses.
Victor,
Adding my SNAT IP to proxy_interfaces seems to have solved my problem.
Thanks very much!
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