Anyone else not able to send email to AOL users?

LuckyTaxi

Diamond Member
Dec 24, 2000
6,044
23
81
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

Lifer
Feb 17, 2000
35,132
1
81
You need to have a reverse dns entry for the ip of your mailserver. AOL is a PITA about that.
 

LuckyTaxi

Diamond Member
Dec 24, 2000
6,044
23
81
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

Diamond Member
Jan 14, 2005
4,763
327
126
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.