From owner-freebsd-questions@FreeBSD.ORG  Wed Jan 17 17:33:51 2007
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Date: Wed, 17 Jan 2007 11:33:47 -0600
From: "Noel Jones" <noeldude@gmail.com>
To: "FreeBSD Questions" <freebsd-questions@freebsd.org>
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References: <000601c73a43$8683c170$6601880a@Enigma>
	<45AE5BBB.6060805@qgsltd.co.uk>
Subject: Re: Load balancing outgoing mail relay
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On 1/17/07, Charles Trevor <ct.lists@qgsltd.co.uk> wrote:
>
> What happens if you do multiple dig/nslookups for smarthost.domain.tld.
> Are the records returned in a different order each time? If not the
> problem may be at the NS.
>

Nope.  Postfix shuffles equal-weight MX records internally, so it
doesn't matter what order the NS presents them.  Multiple A records
without an MX record (or when MX lookups are suppressed) are treated
as equal-weight MX records per RFC.

This is likely a postfix configuration problem.  The original poster
should seek further help on the postfix-users list.
http://www.postfix.org/DEBUG_README.html#mail


-- 
Noel Jones