Anyone else not able to send email to AOL users?

[LuckyTaxi]

112 emails sitting in the queue. The following are the two messages I see.
Everything else goes out except for aol.com accounts.


host mailin-02.mx.aol.com[205.188.156.249] said: 421-: (DNS:NR) http://postmaster.info.aol.com/errors/421dnsnr.html 421 SERVICE NOT AVAILABLE (in reply to end of DATA command)

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host mailin-01.mx.aol.com[64.12.137.89] refused to talk to me: 421 SMTP service not available, closing transmission channel

 

[loup garou]

You need to have a reverse dns entry for the ip of your mailserver. AOL is a PITA about that.

 

[dphantom]

We had same problem with them. Reverse DNS solved it.

 

[LuckyTaxi]

Ughhhhhh ... wait, so put the reverse in our internal DNS?
This just happened all of a sudden. It was working fine and then it stopped working!
Our external DNS is handled by our ISP, but we have internal DNS for our Active Directory network.

 

[dphantom]

Our ISP hosts our MX record externally and they put the reverse entry in. Our internal MX record is NATted so would not appear to the outside.