Mail Flow Troubleshooting

At the command prompt type “NSLOOKUP “.
This will give you a “>” prompt.
Type “set type=MX “.
Type “ “.
You should now get the MX records for “”:
Non-authoritative answer: MX preference = 10, mail exchanger = internet address = internet address = internet address =

Or Use

Using Telnet from Windows to test port 25, from the command prompt window type:

telnet server port
telnet 25
or whoever the SP is ..

521 connection rejected
Connection to host lost.

Blacklist lookup/release:


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