[Mailman-Users] 4.3.0 mail transport unavailable

Mark Sapiro mark at msapiro.net
Sat Jun 14 19:03:39 CEST 2014

On 06/14/2014 09:22 AM, Conrad G T Yoder wrote:
> I have recently (last couple weeks?) started getting "4.3.0 mail transport unavailable” bounces from roadrunner/TW addresses (the rate-limiting issue is not currently rearing its head), and that is causing Mailman (2.1.17) subscriptions to be disabled.  Example error message in the “Bounce action notification” email:
> Reporting-MTA: dns; zapata.dreamhost.com
> X-Postfix-Queue-ID: B6D6B8DB0B72
> X-Postfix-Sender: rfc822; neohiopal-bounces at lists.neohiopal.org
> Arrival-Date: Mon,  9 Jun 2014 05:15:45 -0700 (PDT)
> Final-Recipient: rfc822; foo at roadrunner.com
> Original-Recipient: rfc822;foo at roadrunner.com
> Action: failed
> Status: 4.3.0
> Diagnostic-Code: X-Postfix; mail transport unavailable
>>From googling it appears this is may be a Postfix problem?   Any one else seeing this with roadrunner/time warner?

Yes, it would seem to be a problem with Postfix at zapata.dreamhost.com.
Is dreamhost.com your Mailman host or a downstream relay in this case?
If they are your outbound MTA, it seems strange that this would affect
only mail to the roadrunner.com domain, but in any case, I think it's up
to Dreamhost to fix it.

Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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