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Exchange 2010 Test Setup SMTP Problem


I have setup a test Exchange 2010 Domain as we are looking to move from Exchange 2003
in the future.  It has its own DC and is plugged directly into a Router with forwarding on port 25.

After the intial setup I can send emails but I do not receive any from external sources.

I have setup a "Internet Receive Connector" using the Exchange Server IP address and
selected "Anonymous" only for the permissions groups.

When I telnet into the server from "external and internal" on port 25 I receive the


220 EXCHANGETEST01.*******.CO.UK Microsoft ESMTP MAIL Service ready at Sat, 31 Mar
2012 07:22:49 +0100
421 4.4.1 Connection timed out

Connection to host lost.


The connection is open "until" I try to type any commands which causes it to disconnect immediatly.

Any help appreciated

Mongo Peck
Mongo Peck
4 Solutions
Check this for receive connector configuration from MS this may help.
Mongo PeckAuthor Commented:
Hello I used that for the setup.

But thank you
Make sure that on your router edge network allows port 25 and 110.
Your telnet output looks fine, port 25 is open.

Did you setup your Accepted Domain(s)?  See the following article:

Receive connectors are at the server level but Accepted Domains are at the Organizational level and should be setup first.

Let us know.

1. Open the cmd prompt on Hub Transport Server
2. Telnet localhost 25
3. Now type EHLO and see if it throws the same error.

Post the results and here and I'll tell you what to do next.

~ Singh
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