Adam,
This is from a thread from last year around Christmas. It may shed some light on your
situation as I was having a similar issue. The cause was one of our users was sending
a newsletter to hundreds of AOL customers in a single run. AOL apparently frowns upon
this. See below.
Dave
---------------message start--------------
More on the AOL issue...
This is what I have been seeing also. Despite my efforts, I have been unable to
figure out the ballistics and weighting they are using to generate the algorithm for
the timing\duration\trigger for the block.
During my testing, while AOL is 'resetting' the connection, one is unable to telnet
the SMTP port of their servers from the IP of the mail server(or in some cases, the
entire associated subnet). When one tries to telnet, the connection is dropped(reset)
within a hundred milliseconds. Telneting may be a nice quick test you can use to find
out if AOL dislikes your IP for that brief yet unknown period of time. It turns out
that AOL has been doing this for a while now(months), but I have just recently began
to see the patterns. And this leads me to believe that perhaps they are keeping
archive records of the number of mails sent in a given time from an IP\Domain and
then, when they do block, it is for a progressively longer and longer period, relative
to the past month's history, or whatever.
Here is what you will see in your logs if AOL is 'on your nuts':
12:18 14:17 SMTP-(000003CE) Trying aol.com (0)
12:18 14:17 SMTP-(000003CE) Connect aol.com [64.12.136.121:25] (1)
12:18 14:17 SMTP-(000003CE) rl-recv: connection reset
12:18 14:17 SMTP-(000003CE)
12:18 14:17 SMTP-(000003CE) SMTP_DELIV_FAILED
12:18 14:17 SMTP-(000003CE) >QUIT
12:18 14:17 SMTP-(000003CE) rl-recv: connection reset
12:18 14:17 SMTP-(000003CE)
12:18 14:17 SMTP-(000003CE) requeuing s:\imail\spool\Q337efd002aa.GSC
Dave
-----Original Message-----
From: Mark Brody [mailto:[EMAIL PROTECTED]
Sent: Saturday, December 21, 2002 9:46 AM
To: [EMAIL PROTECTED]
Subject: RE: [IMail Forum] Imail 6.05 Cannot send to AOL.COM
I spent 12 hours figuring this one out because a client could not get
his newsletter out to most of the 15000 aol email addresses.
In a nutshell, AOL is throttling inbound SMTP connections. Not sure how
their algorithm works but it slectively drops the SMTP connection
(connection reset). It really doesn't appear to have a pattern. They are
doing this - presumeably - to prevent spammers from being able to send
emails at a rapid rate.
The workaround is to go into SMTP in Imail and set retries at 288 and
the Queue timer at 10 (minutes). This means that Imail will try to send
queued messages each 10 minutes, 288 times (2 days). I figured with all
the testing I did, that I can get 600-700 emails per hour out to AOL. I
sent sent 2500 eamils to AOL last night and watched the .LST files
closely as they went out. It took 36 retries.
Your log file will show something like this when it fails (Ver 7.04):
12:18 16:19 SMTP-(00000684) Connect aol.com [64.12.137.184:25] (1)
12:18 16:19 SMTP-(00000684) s: s (or rl-rcv: connection reset in Ver.
7.1+)
12:18 16:19 SMTP-(00000684)
12:18 16:19 SMTP-(00000684) SMTP_DELIV_FAILED
12:18 16:19 SMTP-(00000684) >QUIT
12:18 16:19 SMTP-(00000684) s: s
12:18 16:19 SMTP-(00000684) s: s
Hope this helps.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Pete Pesce
Sent: Saturday, December 21, 2002 8:18 AM
To: [EMAIL PROTECTED]
Subject: RE: [IMail Forum] Imail 6.05 Cannot send to AOL.COM
I have been getting the same thing.
It is strange because I can send to certain addresses & Then all of a
sudden I cannot send at all. Does AOL put a Temp block if you are
sending too many messages to them at once? Please help.
Thank you,
Peter Pesce
VP
PersonalizationMall.com
www.PeresonalizationMall.com
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Dustin Freeman
Sent: Thursday, December 19, 2002 9:46 AM
To: '[EMAIL PROTECTED]'
Subject: [IMail Forum] Imail 6.05 Cannot send to AOL.COM
I haven't done a lot of searching yet but has anyone seen this before?
Just in the last few days email to aol.com accounts have been coming
back as undeleverable. No reson is noted.
Delivery failed 3 attempts: [EMAIL PROTECTED]
We have not changed any settings on our server.
Any ideas?
Thank you
Dustin
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-----Original Message-----
From: Adam Cohen [mailto:[EMAIL PROTECTED]
Sent: Friday, June 06, 2003 10:37 AM
To: [EMAIL PROTECTED]
Subject: RE: [IMail Forum] SMTP_DELIV_FAILED w/ aol.com. problem..
Is anyone else having any trouble delivering to AOL?
It sounds like I am doing everything properly.. But the fact is I still
can not deliver to AOL.com.....
Anyone else using Verio IP space able to test in case it is a Verio
specific issue?
Thanks for everyone's input..
Confused,
Adam
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Rod Dorman
Sent: Friday, June 06, 2003 12:49 PM
To: [EMAIL PROTECTED]
Subject: Re: [IMail Forum] SMTP_DELIV_FAILED w/ aol.com. problem..
On Friday, June 6, 2003, 12:12:50, Adam Cohen wrote:
A> I am not DNS aware enough to know.. but one potential issue though..
A> could the fact that 129.250.227.175 reverses to mail.colony1.net
A> cause a problem if my mail server identifies itself as
A> mail1.colony1.net, then the recipient mail server (aol I am told has
A> just made their reverse DNS procedure stricter) checks and does a
A> lookup on my IP to get 129.250.227.175. Then it does reverse and
A> sees mail.colony1.net. And mail1.colony1.net doesn't equal
A> mail.colony1.net... Could that cause an issue?
It shouldn't.
129.250.227.175 reverses to mail.colony1.net
mail.colony1.net resolves to 129.250.227.175
mail1.colony1.net resolves to 129.250.227.175
Even a truly paranoid server should be satisfied with the above.
--
[EMAIL PROTECTED] "The avalanche has already started, it is too
Rod Dorman late for the pebbles to vote." ? Ambassador Kosh
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