Victoriano Giralt:
-- Start of PGP signed section.
> On 13/04/11 17:16, Wietse Venema wrote:
> > Victoriano Giralt:
> >> Wireshark shows "TCP window full" several times while Postfix is
> >> dutifully trying to send the messages and finally the connection is
> >> reset at TCP level.
> >
> > This may be the infamous window scaling problem. See below for
> > workaround.
> Thank you Wietse. No joy :(
>
> I've upgraded to 2.8.2 and set tcp_windowsize following Postfix
> documentation. I've fully stopped Postfix, verified by a process list,
> and started again. The symptoms persist :(
>
> Anyhow, I'll pass the information on to the networking team in case
> there have been any recent changes on the routers.
A tcpdump trace will make clear if this is window scaling ot
something else. There have been several trace analyses on the
mailing list over the past several years.
Wietse
