The Planet Forums > AOL rejects emails

The Planet Forums > Control Panels > cPanel/WHM

mickalo

Jul 8 2004, 10:08 AM

Hello,

we've noticed in the last couple of days, that AOL is rejecting emails sent
from our server. I've checked our rDNS setup and it seems to be fine,
and has been for quiet sometime, this just seemed to start up recently.
We are running the lastest Exim, updated over the weekend. Here is one of
the communications while sending out an email:

CODE

Connecting to mailin-02.mx.aol.com [205.188.156.249]:25 ... connected

SMTP<< 220-rly-yd05.mx.aol.com ESMTP mail_relay_in-yd5.8; Thu, 08 Jul 2004 12:00:07 -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.

SMTP>> EHLO justlightening.justlightening.net

SMTP<< 250-rly-yd05.mx.aol.com rs-64-246-58-87.ev1.net

250 HELP

SMTP>> MAIL FROM:<optionpr@justlightening.justlightening.net>

SMTP<< 250 OK

SMTP>> RCPT TO:<GandLBartels@AOL.com>

SMTP<< 250 OK

SMTP>> DATA

SMTP<< 354 START MAIL INPUT, END WITH "." ON A LINE BY ITSELF

SMTP>> writing message and terminating "."

SMTP<< 421-: (SDI:T1) [url]http://postmaster.info.aol.com/errors/421sdit1.html[/url]

421 SERVICE NOT AVAILABLE

LOG: MAIN

SMTP error from remote mailer after end of data: host mailin-02.mx.aol.com [205.188.156.249]: 421-: (SDI:T1) [url]http://postmaster.info.aol.com/errors/421sdit1.htmln421[/url] SERVICE NOT AVAILABLE

SMTP>> QUIT

Again this just started in the last day or two.... has something suddenly
changed that I may not be aware of, some addition changes in the exim.conf needed, ???

We don't Use MailScanner either.

Any suggestion or help much appreciated.

Mickalo

dynamicnet

Jul 8 2004, 10:32 AM

Greetings:

Read http://postmaster.info.aol.com/errors/421sdit1.html which was in the error message.

You may have some one abusing one or more formmail scripts on your server or otherwise spamming from your server.

Thank you.

mickalo

Jul 8 2004, 10:50 AM

QUOTE

Originally posted by dynamicnet
Greetings:

Read http://postmaster.info.aol.com/errors/421sdit1.html which was in the error message.

You may have some one abusing one or more formmail scripts on your server or otherwise spamming from your server.

Thank you.

As far as I know, that shouldn't be a problem. We have 5 accounts that send out daily newsletters, twice a day, approx., 2-300 emails(mass mailer), and the majority are sent to AOL users, but we've never had any problems untill the last day or two.... strange. They've been running these mailing lists for about 3+yrs

I'll look into the error URL. Thx's
Mickalo

Albo

Jul 8 2004, 01:34 PM

Make sure two things:

1. That the hostname of the machine has an A record to point to the IP that is using.

2. Has a reverse dns record in ev1servers DNS. You can do this in members' area page. ip -> hostname.

If you don't have a reverse dns pointer for the hostname of the machine, AOL will reject any mail you send to them. Their servers run a check on hostnames that send mail to their mailservers, and if they do not resolve, they assume the IP is forged and drop your connection.

Albo

Albo

Jul 8 2004, 01:35 PM

QUOTE

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.

They are saying just that in plain english.

mickalo

Jul 8 2004, 01:40 PM

QUOTE

Originally posted by Albo
They are saying just that in plain english.

that's my concern. Our rDNS was setup a long time ago, working fine, this just happened within the last day or two ?? Unless EV1 has changed something recently.

We investigating it now.

Mickalo

CyberSEAL

Jan 8 2005, 07:58 PM

I had the same problem, it was our firewall.

This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.