[Mailman-Users] troubleshooting out queue backlog

[Kevin Bowen]

> Do you have SPF records and DKIM signing set up?

I believe so - we're nowadays using a hosted smtp provider (proofpoint),
and mail from mailman shows an SPF "pass" in my mail client. I think if
that were the issue it would be affecting all outgoing mail from our
domain, but this appears to be affecting only mailman

>And mailman 2.1.9 is a really old version...

I know. It's a legacy system I inherited.

Kevin Bowen
kevin.t.bowen at gmail.com <kevin at ucsd.edu>


On Thu, Sep 5, 2019 at 2:01 PM Robert Heller <heller at deepsoft.com> wrote:

> At Thu, 5 Sep 2019 13:53:26 -0700 Kevin Bowen <kevin.t.bowen at gmail.com>
> wrote:
>
> >
> > Hello,
> > This morning my mailman instance (2.1.9) was not delivering any mail -
> mail
> > was going into it but not going out. Restarting mailman and sendmail
> caused
> > mail to start flowing again, but several hours later there still appears
> to
> > be a backlog of several thousand files in /var/spool/mailman/out -
> they're
> > draining, but only very slowly, with some of them dating back to this
> > morning, around the time of the restart, and mail delivery appears
> delayed.
> > I'm not sure if it just needs more time to drain the queue, or if
> something
> > is stuck somewhere that needs to be removed - I don't see anything
> relevant
> > logged, but I'm not sure if I'm looking in the right place or what I
> should
> > be looking for. Can anyone give me any pointers to what i should be
> looking
> > at to troubleshoot this?
>
> Look at Sendmail's logs.  My *guess* is that someone is greylisting (or
> even
> blacklisting) your domain or host.
>
> Do you have SPF records and DKIM signing set up?
>
> And mailman 2.1.9 is a really old version...
>
> >
> >
> > Kevin Bowen
> > kevin.t.bowen at gmail.com <kevin at ucsd.edu>
> > ------------------------------------------------------
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> >
>
>
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