[clug] Duplicate messages from the mailing list

[Stephen Rothwell]

Hi Paul,

On Thu, 10 May 2012 09:16:39 +1000 Paul Warren <pwarren at pwarren.id.au> wrote:
>
> Yeah, it seems that it's coming twice from the mailing list, not every 
> message though. Pasting in the headers of one set of duplicates.

OK the diff is:

--- m1  2012-05-10 09:58:32.213095866 +1000
+++ m2  2012-05-10 09:58:44.928971592 +1000
@@ -1,11 +1,11 @@
 Return-path: <linux-bounces at lists.samba.org>
 Envelope-to: pwarren at pwarren.id.au
-Delivery-date: Sat, 28 Apr 2012 11:31:58 +1000
+Delivery-date: Sat, 28 Apr 2012 12:51:57 +1000
 Received: from fn.samba.org ([216.83.154.106] helo=mail.samba.org)
          by pwarren.id.au with esmtp (Exim 4.72)
          (envelope-from <linux-bounces at lists.samba.org>)
-         id 1SNwM0-0005GA-1D
-         for pwarren at pwarren.id.au; Sat, 28 Apr 2012 11:31:58 +1000
+         id 1SNxbO-0005Yf-Q3
+         for pwarren at pwarren.id.au; Sat, 28 Apr 2012 12:51:57 +1000
 Received: from fn.samba.org (localhost [127.0.0.1])
          by mail.samba.org (Postfix) with ESMTP id B16C6AD3D0;
          Thu, 26 Apr 2012 15:33:18 -0600 (MDT)

Which, as you say, means it was delivered from fn.samba.org to your
server more than once.  I did some snooping and here is what is in the
log on fn.samba.org:

Apr 26 15:43:21 fn postfix/smtp[21997]: B16C6AD3D0: to=<pwarren at pwarren.id.au>, relay=pwarren.id.au[59.167.251.97]:25, delay=603, delays=0.06/1.9/0.84/600, dsn=4.4.2, status=deferred (conversation with pwarren.id.au[59.167.251.97] timed out while sending end of data -- message may be sent more than once)
Apr 26 16:06:26 fn postfix/smtp[29586]: B16C6AD3D0: to=<pwarren at pwarren.id.au>, relay=pwarren.id.au[59.167.251.97]:25, delay=1987, delays=1386/0.02/0.84/600, dsn=4.4.2, status=deferred (conversation with pwarren.id.au[59.167.251.97] timed out while sending end of data -- message may be sent more than once)

And so on ... There were 57 of these between Apr 26 15:43:21 and Apr 29
16:31:50 (whatever timezone fn.samba.org sits in).  So you are lucky that
only 2 were delivered :-)

So, it looks like your server is taking too long to respond to the SMTP
conversation (which could be caused by your virus/spam checker if that is
done while the conversation is happening).

-- 
Cheers,
Stephen Rothwell                    sfr at canb.auug.org.au
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