Re: Incoming Mail fails
From: Martyn Fewtrell (mfewtrell_at_networkclub.co.uk)
Date: 06/08/04
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Date: Tue, 8 Jun 2004 16:24:44 +0100
I have just tried telnet from the internal network and this works fine. I
then tried telnet from the external network and this also now works fine. I
cant be sure whether this is due to a change that I have made or whether I
completed the procedure incorrectly in the first instance.
I have then tried emailing the client from my network again using my mail
server but this again fails with NDR
There was an SMTP communication problem with the recipients server - 5.5.0
Yes there is a firewall/router and this is set up to forward all requests on
Port 25 to the internal IP of the mail server. to the best of my knowledge
this appears to working correctly. I am not aware of another SMTP servers or
other devices listening on Port 25.
Martyn Fewtrell
mfewtrell@networkclub.co.uk
"Denis McDowell [MSFT]" <denismcd@online.microsoft.com> wrote in message
news:enn1JaVTEHA.1732@TK2MSFTNGP09.phx.gbl...
> It sounds like there is either a third-party SMTP handler on the server or
a
> device (firewall?) performing SMTP proxy in front of it.
>
> Can you perform a telnet from inside the network and succsessfully deliver
> mail?
>
> --
> Denis McDowell [MSFT]
> "Martyn Fewtrell" <mfewtrell@networkclub.co.uk> wrote in message
> news:uUWNnRTTEHA.3548@TK2MSFTNGP09.phx.gbl...
> > Good morning!
> >
> > I have a client running Exchange 2000 sp3 on windows 2000 server. SMTP
> > mail
> > is forwarded to the server across a broadband router/firewall using port
> > forwarding. Everything has worked fine for about 9 months, until BT
> > cancelled their broadband account in error. Since the account has been
> > re-established the server crashed ( a coincidence I assume) and now the
> > mail
> > server will not accept incoming mail.
> >
> > The client can send and receive mail to/from each other within the
office
> > and can also send mail out of the system to third parties, but any mail
> > sent
> > to the server gets bounced with an error
> >
> > Your message did not recieve some or all the intended
> > recipients............
> >
> > (general information here)
> >
> > There was a SMTP communication problem with the recipients email server.
> > Please contact your system administrator.
> >
> > 5.5.0 - [217.159.37.210]:32555 is currently not (doesn't say anymore
after
> > this)
> >
> > I tried connecting using telnet as per KB153119 from an XP machine.
> >
> > The telnet successfully connects and the mail server responds to EHLO.
> > However after this the mail server will not accept a MAIL FROM command
and
> > responds that
> >
> > 5.5.4 Unrecognised Parameter
> >
> > I cant seem to find any advice as to where to go from here so all
> > suggestions would be welcomed.
> >
> > Martyn Fewtrell
> > mfewtrell@networkclub.co.uk
> >
> >
>
>
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