[sclug] duplicate mail

[Dickon Hood]

On Thu, Jun 28, 2007 at 09:47:39 +0100, Alex Butcher wrote:
: On Wed, 27 Jun 2007, Dickon Hood wrote:
: >On Wed, Jun 27, 2007 at 18:22:21 +0100, Jonathan H N Chin wrote:
: >: Dickon Hood <sclug at splurge.fluff.org> wrote:
: >: > On Wed, Jun 27, 2007 at 10:13:05 +0100, Darren Davison wrote:
: >: > : does anyone know why I might be receiving duplicate copies of most 
: >(but not
: >: > : all) sclug list mail? [...]
: >: > It's a bug in Tom's mail setup, from what I can tell.  I've no idea 
: >what
: >: > or why, but this is the only list to reliably and repeatedly duplicate
: >: > mail.

: >: It is probably just because most people are too lazy to clean up
: >: the To: and Cc: headers.

: >It isn't.

: [snip]

: >No, the mailing list server is duplicating deliveries.  This is clear from
: >the headers.

: In that case, it's probably an interaction between your mail path and the
: list mailserver; something in your path is taking too long to say that it's
: accepted the first copy of the message, the list mailserver thinks the
: connection got abandoned and sends another copy (arguably without giving the
: original a fair chance).

Indeed.  AIUI the list server is at the wrong end of an ADSL line, which
certainly isn't helping.

As I say, this is the only list I have issues with.  The other mailing
lists I subscribe to, which are responsible for a couple of hundred emails
a day, all following the same path, do not have this problem.

Mail flows from the end user, to the mailing list machine, to a
Blackcat-hosted virtual machine (unloaded), to my own colo machine
(unloaded), and is delivered to my mailbox there.  I read it on-spool
using mutt.

Now, I don't know if Zen are doing something interesting with outbound
port 25 (if I was running a medium-to-large consumer-level ISP I certainly
would), but something appears to be causing vigra.tmdg.co.uk
([82.69.226.34] helo=wallis.weardale.cl) to redeliver.

-- 
Dickon Hood

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No virus was found in this outgoing message as I didn't bother looking.