delivery to aol recipients has been delayed - error

[wfbtr]

I'm getting the aol delivery error when people send mail from my domain to aol.

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.

xxx@aol.com

I've done some searching and haven't found any clear answer about this one. I'm running E2K3.
thanks.

 

[johng75]

im having the same error, except mine dont say that "i do not" need to resend, mine say it has been rejected.......

 

[johng75]

NVM i found my answer, i do not have a reverse DNS entry for the MX record, and aol treats you like span if one is not set-up, check dnsstuff.com to see if you have one.......GL

 

[wfbtr]

thanks.
which test did you do?

 

[wfbtr]

MCI created the reverse DNS PTR records for my domain over a week ago, but I'm still getting the same problem. I assume they created a record for my MX record- is that correct?

 

[nickpark]

Does

http://www.dnsreport.com/

now show a PASS for the Reverse DNS entries for MX records test ?

 

[wfbtr]

Hi Nick-
yes, it shows a PASS.

 

[wfbtr]

Just got a response from MCI. My mail server is resolving to a different IP- not sure why. He went ahead and added a PTR record for that IP.
When I PING my mail server's dns name it gives the correct IP.
So why is my connection from my mail server coming from a different IP?

 

[jpm121]

goofy nat setting on your firewall would be my guess. Was it at least an IP address in your range?

 

[wfbtr]

my router is managed by mci. the ip is registered to uunet, which i think is an mci parnter (?).
i have a dual nic server that is my mail server, so maybe it's originating from the wrong interface?

 

[nickpark]

Well you can test that. Send a mail from it to a hotmail address and view the email headers when you receive it in hotmail. One of the first lines will be a Received: from mx1.domain.co.uk ([194.nn.nn.nn]) type format...

I just had the owner of my IP address setup my PTR record. It was a completely different company to my ISP, but they set it up very quickly for us. And immediately afterwards, aol emails started working.

I did some tests via manual telnet SMTP on my mail gateway.

First, I used nslookup to get an aol MX mailserver... mailin-01.mx.aol.com
ie... nslookup
set type=mx
aol.com
exit

Our conversations went like this:
(Blue writing is my commands)
(Red writing is aol responses)

(the "peer name unknown" is the telling part)

----------- BEFORE PTR RECORD SET UP ---------------

[COLOR=blue]telnet mailin-01.mx.aol.com 25[/color][COLOR=red]
220-rly-xg06.mx.aol.com ESMTP mail_relay_in-xg6.3; Tue, 12 Jul 2005 13:44:13 -0400
220-America Online (AOL) and its affiliated companies do not
220-     authorize the use of its proprietary computers and computer
220-     networks to accept, transmit, or distribute unsolicited bulk
220-     e-mail sent from the internet.  Effective immediately:  AOL
220-     may no longer accept connections from IP addresses which
220      have no reverse-DNS (PTR record) assigned.
[/color][COLOR=blue]ehlo mydomain.co.uk[/color][COLOR=red]
250-rly-yg05.mx.aol.com peer name unknown
250 HELP
[/color][COLOR=blue]mail from:<nickpark@mydomain.co.uk>[/color][COLOR=red]
250 OK
[/color][COLOR=blue]rcpt to:<test.user@aol.com>[/color][COLOR=red]
250 OK
[/color][COLOR=blue]data[/color][COLOR=red]
354 START MAIL INPUT, END WITH "." ON A LINE BY ITSELF
[/color][COLOR=blue]hello
.[/color][COLOR=red]
421-:  (DNS:NR)  [URL unfurl="true"]http://postmaster.info.aol.com/errors/421dnsnr.html[/URL]
421 SERVICE NOT AVAILABLE
[/color]

----------- AFTER PTR RECORD SET UP ---------------

[COLOR=blue]telnet mailin-01.mx.aol.com 25[/color][COLOR=red]
220-rly-xg06.mx.aol.com ESMTP mail_relay_in-xg6.3; Tue, 12 Jul 2005 17:46:15 -0400
220-America Online (AOL) and its affiliated companies do not
220-     authorize the use of its proprietary computers and computer
220-     networks to accept, transmit, or distribute unsolicited bulk
220-     e-mail sent from the internet.  Effective immediately:  AOL
220-     may no longer accept connections from IP addresses which
220      have no reverse-DNS (PTR record) assigned.
[/color][COLOR=blue]ehlo mydomain.co.uk[/color][COLOR=red]
250-rly-xg06.mx.aol.com mx1.mydomain.co.uk
250 HELP
[/color][COLOR=blue]mail from:<nickpark@mydomain.co.uk>[/color][COLOR=red]
250 OK
[/color][COLOR=blue]rcpt to:<testuser@aol.com>[/color][COLOR=red]
250 OK
[/color][COLOR=blue]data[/color][COLOR=red]
354 START MAIL INPUT, END WITH "." ON A LINE BY ITSELF
[/color][COLOR=blue]hello
.[/color][COLOR=red]
250 OK
[/color][COLOR=blue]quit[/color][COLOR=red]
221 SERVICE CLOSING CHANNEL
Connection to host lost.
[/color]

Does your NSLOOKUP work and do you get the "peer name unknown" when you say 'EHLO'?

 

[wfbtr]

Hi Nick-
thanks for the response.
my nslookup does work and i don't get the "peer name unknown". though i do get a syntax error when i do the "mail from:<me@mydomain.com>" command.

MCI created a pointer to the IP that my mail server is supposedly originating from. So I'm not getting the AOL error anymore. I just can't figure out why the IP changed and why it's not originating from my external IP anymore.

 

[nickpark]

How many NIC's do you have on the E2K3 server. Is that connected directly to the internet (ie no smarthosts, etc.)?

Check your routing... 'ROUTE PRINT'