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Exchange open ports

By info ·

I have client running WinNT 4.0 and Exchange 5.5 and they are behind Sonicwall firewall. The exchange is listed as a OPEN RELAY at this DSBL.ORG. But the exchange is setup for closed relay. We still have problem to send email from exchange toa lot of email addresses end with or or .... I talk to these people at and they said "Appear to be
running an open http, socks4 and socks5 proxy on the exchange" Can any body tell me what they are talking about and how toresolve the issue. Thank you very much for any input. Moe

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Exchange open ports

by clearsmashdrop In reply to Exchange open ports

This happened to us once. The way you cant if you are an open relay is to use the outbound smtp address of your sever (ie: ) to try and send email from another network. (ie: send your mail out via your server)

If you can do that, then you are an open relay. Sorry, I dont remember where we fixed it though.

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