Very Strange Email/Connection Issue

[Richard K]

Network #1
SBS 2003 R2 Server
E2k3

Network #2
SBS 2003 R2 Server
E2k3

I have a user on network #1 that is trying to send emails to a user on
network #2. The emails fail when a user on Network #1 is trying to send an
email to a user on Network #2. After closer examination of the email I
notice that the email is in an Exchange queue on network #1 in a "retry"
state. From the SBS 2003 R2 server on network #1 I try a "telnet
server.domain.com 25" to the server on network #2. The telnet responds with
a proper response so the connection is not lost. In addition if the user on
Network #1 sends an email to another user in a seperate domain or even a
gmail or aol account the email works perfectly as well as the "reply" so the
incoming works as well.

There is something specific between the SBS servers on Network #1 and
Network #2. But with a successful Telnet and ping of the servers all looks
good. What is going on? How do I diagnose?

Thanks!

-Richard K

 

[PA Bear [MS MVP]]

Try posting to an Exchange-specific newsgroup, Richard (e.g.,
microsoft.public.exchange.misc).