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neonlights1111

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Unable to pass email to a specific domain.

I have decom'd an old exchange 2000 email server.  And replaced it with a newer System running exchange 2000.  name of old email server is mail and the new email server is mx1.

After moving all jobs, mailbox's, ect over, uninstallng esm from MAIL I am having 1 problem.  It seems that I am unable to pass any email to or from AOL from my new MX1 exchange server.  I have put in spf record in my DNS, I have assured that I have mx1 in my telco provider dns. I have even requested and been accepted into AOL's whitelist.  And yet no emails are being passed sending or receiving.  I am not on anyblacklists.  I dont have open relay either.

in event viewer I have recieved.

event ID 4000  MXExchangeTrasnport
Message delivery to the remote domain 'aol.com' failed for the following reason: The connection was dropped by the remote host.

event ID 4001  MXExchangeTrasnport
The SMTP verb which caused the error is 'MAIL'.  The response from the remote server is '521-EHLO/HELO from sender x.x.x.75 does not map to mx1.x.lan in DNS
521-sending machine n'.

our outgoing email port is x.x.x.2 as well.  x.x.x.75 is the firewall.

I am totaly lost, any help is greatly appriciated.
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Irwin Santos
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