Exchange Server on Blacklist - Again

I am being told that my mail server is not giving out a proper name, so we keep being blacklisted, what setting in exchange 2003 should i change to resolve this. Error i am getting is <casvr002.childadvocates.ns #5.5.0 smtp;550-69.39.135.189 blocked by ldap:ou=rblmx,dc=comcast,dc=net>. I have been taken off of the blacklist then put back on 3 days later, thanks
jon3629Asked:
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SembeeCommented:
You should probably review my dns configuration page.
http://www.amset.info/exchange/dnsconfig.asp

From the error above your SMTP banner is invalid.
The IP address 69.39.135.189 has no valid reverse DNS, so that is at least two settings that are incorrect.

Simon.
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jon3629Author Commented:
I changed the banner to mail.childadvocates.net, i am still confused on how to set up the reverse DNS though, i checked perform reverse dns lookup, what other setting should i be changing, thanks again
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SembeeCommented:
You don't set the reverse DNS. Your ISP does. The reverse DNS is attached to the external IP address of the Exchange server.

Simon.
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