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Exchange 2003 rejecting SMTP from internal network servers

Posted on 2009-07-15
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Last Modified: 2012-05-07
I just configured IMF on Exchange 2003. After doing so, other servers within the LAN are receiveing NDR's when trying to send SMTP traffic to the Exchange box. I've added our internal LAN subnet to the Global Sender ID and Connection Filter Configuration settings. Is there any thing else I'm missing.
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Question by:PolymerMan
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Expert Comment

by:Alan Hardisty
ID: 24864250
Have you added the IP addresses of your internal servers to the Perimeter IP List and Internal IP Range Configuration?  (General Tab of Message Delivery Propertie)
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Expert Comment

by:Alan Hardisty
ID: 24864273
Have you also added these IP to the default SMTP Virtual Server - Access Tab, Relay Restrictions?
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Author Comment

by:PolymerMan
ID: 24864283
Thank you for your response. Yes I have added single IP and network range the entries in the global configuration.

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Author Comment

by:PolymerMan
ID: 24864301
I have also added the IP range to the virtual server relay configuration
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Expert Comment

by:Alan Hardisty
ID: 24864322
Have you tried telnetting from the problem servers to port 25 on the Exchange server?
What result / response do you get?
Can you try to send a message and post the results please.
http://support.microsoft.com/kb/153119 
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Author Comment

by:PolymerMan
ID: 24864352
Yes I have added our internal servers to the perimeter IP List and Internal IP Range configuration
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Expert Comment

by:Alan Hardisty
ID: 24864381
Did you see my Telnet suggestion?
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Author Comment

by:PolymerMan
ID: 24864404
I get 550.5.7.1 NDR

ready at  Wed, 15 Jul 2009 14:26:51 -0700

Data
354 Start mail input; end with <CRLF>.<CRLF>
Subject: Test message
Test.
.
550 5.7.1 Requested action not taken: message refused


Connection to host lost.
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LVL 76

Expert Comment

by:Alan Hardisty
ID: 24864463
Have you got the Intelligent Message Filtering Action set to Reject or No Action?
If the former, please change it to No Action and test again.
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Author Comment

by:PolymerMan
ID: 24864571
IMF was set to reject, so I change the setting to No Action and performed the Telnet session. With the setting set to No Action, the message was sent and I received it in my Junk E-Mail. Is it possible to have the setting at Reject but allow from internal servers.
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LVL 76

Expert Comment

by:Alan Hardisty
ID: 24864605
Did you restatr the Simple Mail Transfer Protocol (SMTP) service after setting up the filtering?
If not, please restart it and then change the No Action setting back to Reject.
Please test again.
Do you have any spam filtering softweare on the server?
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Author Comment

by:PolymerMan
ID: 24864675
I set IMF to Reject and restarted Simple Mail Transfer Protocol (SMTP). My Telnet test rejected the message once again.
Yes I do have AntiSpam software loaded on the Exchange server. It is Symantec Mail Security for Microsoft Exchange Version 6.0.8.262
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Expert Comment

by:Alan Hardisty
ID: 24864747
Did you enable Sender ID Filtering on the SMTP Virtual Server?  Are all the items checked?  If not - please check them all and restart the SMTP service again, then test again.
With the SMSMSE installed, you should be able to leave the IMF set to No Action and let SMSMSE deal with the spam, but it is another useful layer of filtering.
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Author Comment

by:PolymerMan
ID: 24864763
Yes all options were already checked.
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Expert Comment

by:Alan Hardisty
ID: 24864790
Well it's not exactly working as it should do but you do have a workaround.
Have you downloaded all Windows Updates for the Exchange Server? - go back several times if you have any updates to download until none left.
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Author Comment

by:PolymerMan
ID: 24864798
Thanks
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Accepted Solution

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Alan Hardisty earned 500 total points
ID: 24869453
Are you happy with this now or do you need further assistance?  Appreciate that it is not 100% perfect.
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Author Closing Comment

by:PolymerMan
ID: 31612518
The solution was a work around which lead to lowering the SPAM settings.
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