Re: [Exim] Desperation: Connection Reset by Peer

Hi,
> My first thought would be that something else in the data path (or
> near it) could be resetting the connection.
>
> Unfortunately your attached trace doesn't show what I'd look for next
> to confirm that theory - examine the returned RST packets for signs of
> different TTLs to the normal packets received from the remote mail
> server ('tcpdump -v' is good for this.)
We've got the full packet dump so I'll check this next. Thanks.

> Recently I've encountered a firewall (Symantec's Velociraptor) that
> will reset SMTP connections when it believes them to have breached the
> protocol specification (which, it so happens, it wasn't.) I've also
> seen connections reset by over-zealous network-nanny software (Websense,
> Surfcontrol, etc)
>
> All of these may well be at the remote site, rather than under your
> control. Your best bet is probably to start a dialogue with their
> admins (though that might be hard for the example you give -
> BTinternet's mail is now also handled by Yahoo.)
Exactly - luckily there is one 'friendly' site that consistently resets
the connection (also FreeBSD); they may well be more co-operative.

Thanks to all that responded.
Regards,
Martin