Re: timed out while sending end of data

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timed out while sending end of data
\ Pascal Maes (21 Oct 2007)
. \ (Wietse Venema) (21 Oct 2007)
. . \ Pascal Maes (21 Oct 2007)
. . . \ Ralf Hildebrandt (21 Oct 2007)
. . . \ (Wietse Venema) (21 Oct 2007)

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Subject:	Re: timed out while sending end of data
Group:	Postfix-users
From:	(Wietse Venema)
Date:	21 Oct 2007

Pascal Maes:
> Le 21 oct. 07 ? 20:43, Wietse Venema a ?crit :
> > Pascal Maes:
> >> Hello,
> >>
> >> Postfix version 2.4.5
> >>
> >> I have sometime the message "timed out while sending end of data" and
> >> then the message is deferred, but with some domains the problem seems
> >> persistent and the recipients receive the mail a lot of times :
> >>
> >> Oct 1 09:53:01 smtp-1 postfix/smtp[3785]: A9CA8E8A02:
> >> to=<alain.masure>, relay=mail.fwa.be[213.177.155.226]:25,
> >> delay=235723, delays=234996/0/26/702, dsn=4.4.2, status=deferred
> >> (conversation with mail.fwa.be[213.177.155.226] timed out while
> >> sending end of data -- message may be sent more than once)
> >>
> >>
> >> Should I do something here ?
> >
> > If using PPP over ethernet, you may have to reduce the MTU on your
> > network interface.
> >
> > Wietse
>
> It's not the case, we have a direct connexion to the Internet.

If the receiving end has a narrow pipe (such as PPPoE), then your
default 1500 byte IP datagrams won't get through.

Does your firewall block ICMP "must fragment" notifications? Either
fix this, or turn off IP path MTU discovery in the local kernel.

Wietse