LB1234
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What does it mean when I telnet to a mail server and nothing is displayed?
We have two exchange 2007 servers, one old and one new. The old one has no mailboxes on it, the new one has all user mailboxes. I'm trying to use a third party program that takes phone messages and file attaches them to email, sent via our internal exchange server. When I telnet to the old exchange server, i get several responses, however, when sending to the new server i get a blank screen, and any character entries immediately put me back at a C:\ prompt. What would be causing this? What can i do to troubleshoot this problem? Obviously once the new mail server responds to telnet, the 3rd party app will be able to work. Thanks!
Npatang
Make sure that port 25 is congigured on the recieve connectors. In The RMC , recieve connector proerties you can check the same
have configured recieve connector?
I suppose you telnet to port 25 to check if the service is answering, not the real telnet port ?
cmd> telnet exchange_server 25
cmd> telnet exchange_server 25
Sounds like authentication issue. Try creating a connector that only allows the ip address of the 3rd party server trying to relay and choose externally authenticated. After that change, restart the Microsoft Exchange Transport Service and then give it a try.
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Is there any setting on that server itself that would disallow a successful telnet test on port 25?
ASKER
Would I do a packet trace at this point?
can you post a netstat -an from the server?
If the SMTP Server service wasn't running, then you wouldn't get a blank flashing screen. It would return immediately with connection failed. You can do that for yourself by telnet to port 25 of a system you know doesn't have SMTP - like a workstation.
A blank screen means the connection is trying to be made but is being blocked.
Simon.
A blank screen means the connection is trying to be made but is being blocked.
Simon.