We are using Exchange Server 2003, version 6.5 SP2. We have some
outside contacts that when we email to we get a notification message:
"This is an automatically generated Delivery Status Notification.
THIS IS A WARNING MESSAGE ONLY.
YOU DO NOT NEED TO RESEND YOUR MESSAGE.
Delivery to the following recipients has been delayed.
'ourintendedrecipient'@aol.com "
I turned on Diagnostic Logging for MSExchangeTransport, and set all
categories to Maximum. I then looked in Event Viewer and I am seeing Event
IDs 7002, 7004, 4007, 4000. The majority is ID 7002. A sample of ID 7002:
"This is an SMTP protocol warning log for virtual server ID 1, connection
#10127. The remote host "207.234.177.72", responded to the SMTP command
"rcpt" with "451 bad reverse DNS ". The full command sent was "RCPT
TO:<b-aficl...@worldofquizzesmail.com> ". This may cause the connection
to fail. "
I hope this is enough details. I have researched and am not sure if I am
being used as a mail relay and/or being blocked as a result. Am I on the
right track? I cannot send an aol.com mail recipient or a juno.com mail
recipient. Both addresses are valid and the people work for us and cannot
recieve our internal emails.
Any help would be greatly appreciated!
--
Thank you,
Brian
Do you have reverse DNS (a PTR record) configured for the IP address of your
outbound Exchange server?
"Brian" <brian...@koc-pa.com.(donotspam)> wrote in message
news:417A5865-82EF-45CC...@microsoft.com...
Juno is probably doing the same thing.
Hello Brian,
You need to create a reverse DNS entry for your email server, or for whatever
IP address that AOL is picking up. AOL specifically blocks IPs without valid
Reverse DNS entries. You can read about their policies here, run some tests,
and read error messages here: http://postmaster.aol.com/
Juno is probably doing the exact same thing, and many others are set up this
way as well.
Sara
Hello Brian,