From: Rocco Scappatura (Rocco.Scappaturainfracom.it)
Date: Thu Apr 24 2008 - 03:02:04 CDT

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> > > A downstream MS Exchange server can't relay message
> trough my SMTP
> > > relay server.. I know that is a MS exchange matter, but
> I'm couroius
> > > of what it can be the cause of timeout..
> > >
> > > In my log I get this error message:
> > >
> > > Apr 23 17:59:56 av5 postfix/smtpd[11439]: warning:
> xxx.yyy.zzz.www:
> > > hostname host-xxxx.yyy.it verification failed: Name or
> service not
> > > known Apr 23 17:59:56 av5 postfix/smtpd[11439]: connect from
> > > unknown[xxx.yyy.zzz.www] Apr 23 18:04:56 av5
> postfix/smtpd[11439]:
> > > timeout after MAIL from unknown[xxx.yyy.zzz.www] Apr 23
> 18:04:56 av5
> > > postfix/smtpd[11439]: disconnect from unknown[xxx.yyy.zzz.www]
> > >
> > > Thanx,
> > >
> > > rocsca
> > >
> >
> > Thaen, anyone has never experienced this problem?
> >
> > Thanx,
> >
> > rocsca
>
> You need to include the output of: 'postconf -n' with your request.
>
Indeed I have no problem with other MS Exchange downstream server.. so I
think that the problem is between Exchange and the firewall in front of
it. I sollecite the customer for furthr investigations..

Thanx,

rocsca

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