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SMTP

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by lucky

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What ports could be blocking smtp from relaying mail. I can send to people in my company but not outside my company.

4 replies

by waldbm

The problem may not be due to ports at all, but rather the lack of being able to resolve the SMTP address from DNS. I will assume that you are using Exchange 2000. If you have configured a virtual server to send and receive internet SMTP addresses, then this unit must be able to use DNS to resolve the SMTP address. If you are forwarding outbound mail to an 'SMTP smart host', then this unit must be able to use DNS to resolve the SMTP addresses.
If you are using a smart host then your exchange server must be pointed to it, i.e mail should be directed to go to the smart host. On a 2000 server this would be set up in System Manager under the connectors sub set of the OU.
Hope this helps a little.

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