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New Exchange 2003 Server not receiving Email

Posted on 2006-07-24
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Last Modified: 2012-05-07
Here is the deal.  We implemented an Exchange 2003 server over the weekend.  We moved from POP mail to Exchange.  Over the weekend, it seemed that incoming and outgoing mail was fine.  Last night I realized all incoming and outgoing mail had stopped.  I added a smarthost and now all outgoing mail stuck in the queue has sent, so that issue seems to be resolved.  However, still no incoming mail.  I have a Linksys Router with Port 25 forward to Mail server.  Public IP address is: 68.195.87.159.  I can telnet to port 25 from outside.  

This is a very urgent issue, any help is much appreciated.
Thanks.
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Question by:mattysyr
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ryangorman earned 500 total points
ID: 17166916
1. Use DNSstuff.com to confirm that the MX record for your domain points to your external IP address.
2. Then telnet to your mail server's internal address and send a test message [1].
3. Then telnet to your mail server's external address from an external IP and send a test message [1].

I tried point three with the IP provided and was unable to connect. The connection is accepted but no banner is displayed before the connection is dropped soon after.


[1] helo <>, mail from:<> rcpt to:<>, data etc
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by:mattysyr
ID: 17166925
Why would the connection be dropped?  Any ideas?  Configuration issue on mail server itself?
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by:ryangorman
ID: 17166961
Some router/firewalls filter SMTP traffic in an atempt to protect the mail server. This should not cause the connection to drop. You can eliminate a configuration issue on the mail server by performing step 2 in my previous post.
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by:mattysyr
ID: 17167133
It seems it was a realing issue.  Added IP of mail server and all is OK...
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by:ryangorman
ID: 17167312
Realing? Do you mean Network Address Translation?
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by:mattysyr
ID: 17167347
Relaying, sorry for the typo.
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