side note on this... I had the same problem about 6 months ago from a mom
and pop type hosting outfit.. I called them to ask them what was up and
after about 30 mintes of them telling me there was no problem we hung up and
I was ready to ban them from my entire network.. Then mysteriously about an
hour later it was fixed........
My sugestion... Call them and then wait.
--JT
----- Original Message -----
From: "Charles Cazabon" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, June 29, 2001 10:24 AM
Subject: Re: stopping "Possible_duplicate!"
> Omar Thameen <[EMAIL PROTECTED]> wrote:
> > >
> > > A few duplicate deliveries are harmless -- and as they're the fault of
the
> > > receiving system, if the recipient is annoyed, tell them to tell their
> > > postmaster to fix their system, and not to be angry at you.
>
> > Do you have any idea what types of issues or configurations cause this
> > to happen?
>
> Their mailserver is unstable or does not conform to RFC821/2821. Their
> network is unstable. Who knows? For whatever reason, they are failing to
> issue the required 2xx code after they see the end-of-data <CR LF "." CR
LF>.
> Without the 2xx response, the sender is required to consider the delivery
a
> temporary failure.
>
> > I'd like to be able to point them in the right direction, and the
biggest
> > problem is the fact that it's not happening with any other mail they
> > receive. Thus, the fingers get pointed at my system.
>
> qmail tends to excercise other receiving MTAs somewhat differently than
> sendmail, for instance -- perhaps their smtpd can handle fifty messages
dumped
> serially over a single SMTP session, but can't cope with qmail opening a
> separate session for each message. In that case, their incoming smtp
> concurrency is set too high, and that's a configuration problem on their
end.
>
> Charles
> --
> -----------------------------------------------------------------------
> Charles Cazabon <[EMAIL PROTECTED]>
> GPL'ed software available at: http://www.qcc.sk.ca/~charlesc/software/
> -----------------------------------------------------------------------
>
