transport, 2k server can recieve mail from 5.5 but not from another 2k server

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transport >> 2k server can recieve mail from 5.5 but not from another 2k server

by Seth » Fri, 15 Aug 2003 01:39:00 GMT

I have a very strange problem that i have been unable
to solve. I have 3 exchange servers, one 5.5 (server A)
one Exchange 2k server that has been in production appx 6
months (server B) and one new 2k server (server C). Im
migrating off the 5.5 server. All the servers are in the
same organization. So i setup a new 2k server and mail
sent from anyone on the 5.5 server (server A) is
delivered fine to server C. But anyone on Server "B" that
sends messages to server C, it gets hung up in the smtp
queue and then after 3 days sends an NDR. SMTP traffic is
wide open between all the 3 servers, no strange dns or
other issues. Just for grins, i rebuilt server C, same
problem. And, i setup a new 2k server thinking that
server B might be the problem. Nope, still unable to send
mail to server C. Mail between A and B works fine.

Is there something im missing?? My environment is
really cut and dry. If someone could shed a bit of light,
theres a steak dinner in it for ya ;)

-s
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transport >> 2k server can recieve mail from 5.5 but not from another 2k server

by Patrick Genova (MSFT) » Fri, 15 Aug 2003 02:44:00 GMT


Hi Seth,

While there can be many causes of this the first thing I would look at is
what is between the 2 Servers? Any switches or more importantly is there a
firewall between them? Can you do a Telnet from Server B to Server C and see
the Exchange banner from Server C or is it a firewall that answers?

--
Patrick Genova
XXXX@XXXXX.COM
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transport >> 2k server can recieve mail from 5.5 but not from another 2k server

by Seth » Fri, 15 Aug 2003 07:11:15 GMT


Thanks, you put me in the right state of mind. I could
reach the server on port 25, but it turns out i had to
change an acl on the concentrator that was allowing the
smtp traffic, but stripping the header information. That
fixed it. Works perfectly now. Thanks!

-seth

would look at is
importantly is there a
to Server C and see
that answers?
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