[Mailman-Users] sendmail issues

Steff Watkins s.watkins at nhm.ac.uk
Thu Jun 17 15:47:12 CEST 2010

> -----Original Message-----
> From: mailman-users-bounces+s.watkins=nhm.ac.uk at python.org
> [mailto:mailman-users-bounces+s.watkins=nhm.ac.uk at python.org] On
Behalf Of
> Paul Flower
> Sent: Thursday, June 17, 2010 1:55 PM
> To: mailman-users at python.org
> Subject: [Mailman-Users] sendmail issues
> Problem is this:
> I can create a new mailing list no problems and subscribe a handful of
> users
> to it and send out email without any dramas but as soon as I import
> entire mailing list subscribers (152 members so not big by any stretch
> the imagination) nothing goes out. It all appears to work fine but no
> emails go out. 

Immediate diagnostics, as others have suggested, involve looking at the
logfiles for your MTA and checking that they have actually been "sent".

It could be that your network provider has a mechanism for
side-spooling/delaying/blackholing email subsmissions to large numbers
of recipients. So sending to 20 addresses would be OK, but one you start
sending to more than that the email is automatically "quarantined" in
the event that it may prove to be spam.

Check with your network provider to make sure that there are no "limits"
in place that may have delayed your outbound emails. Also check with
your local system's mail spool and make sure that the emails aren't all
sat in an outbound queue waiting to be cleared/sent.

Good luck,
Steff Watkins    Natural History Museum, Cromwell Road, London, SW7 5BD
Systems programmer   Email: s.watkins at nhm.ac.uk 
Systems Team    Phone: +44 (0)20 7942 6000 opt 2
Many were increasingly of the opinion that they'd all made a big mistake
in coming down from the trees in the first place. And some said that
even the trees had been a bad move, and that no one should ever have
left the oceans. - HHGTTG 

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