[Mailman-Users] Help needed using postfix as an outbound gateway for Mailman

Mark Sapiro mark at msapiro.net
Thu Nov 15 18:59:59 EST 2018

On 11/15/18 8:17 AM, David Gibbs wrote:
> The problem is, I'm seeing this in my mail log...
> Nov 15 15:41:43 lists postfix/smtp[18136]: AA76A61E61:
> to=<testlist1-bounces at lists.atestdomain.net>, relay=none, delay=0.01,
> delays=0/0/0/0, dsn=5.4.6, status=bounced (mail for localhost loops back
> to myself)
> It _appears_ that postfix thinks it's the mail server for
> lists.atestdomain.net and can't deliver the mail because it doesn't know
> how to deliver the message.

Exactly. Postfix thinks it is the delivery agent for all mail to any of
the domains in mydestination which includes localhost.

> Here's my current setup:
> master.cf
> 24      inet  n       -       n       -       -       smtpd

Is that all of master.cf? If there is an entry

smtp      inet  n       -       y       -       -       smtpd

you might try removing that, or remove the 'localhost' entries from

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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