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Exchange 2000 - IM not delivered

I am currently experiencing problems with incoming SMTP mail. (Outgoing SMTP mail is fine).

I have an SMTP gateway running Mailsweeper in the DMZ which squirts incoming SMTP mail onto an Exchange 2000 box. No external emails are getting in. External senders of mail receive NDR's of 5.7.1 (Permanent Failure - security: delivery not authorised, message refused). Unable to relay.

I have activated logging on the connector and noticed that SMTP sessions are initiated by the sender with the local Exchange box but local delivery is refused.

Anyone any ideas?
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jkan052699
Asked:
jkan052699
1 Solution
 
bluezoo7Commented:
Could the problem be with MAILsweeper? Make sure there are no rules on that server that prevent the delivery of external mail to your internal mail servers (look out for wild cards like *@*.com).

Check to make sure that Mailsweeper can talk to the Exchange server: telnet to port 25 from the mailsweeper server to the Exchange server and send a test message to an internal user.

If successful, the problem is probably a rule on Mailsweeper.

BZ7
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jkan052699Author Commented:
Thanks

I've sorted it now.
It wasn't Mailsweeper.

DNS problem
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