Re: SMTP to AOL
- From: "Kevin A" <kevina@xxxxxxxxxxx>
- Date: Wed, 19 Jul 2006 07:40:06 -0400
Sure, sorry for the delay.
We are NAT'ing our DMZ and we setup alias external ports. In order for our
mail traffic to be legitimate, we have to have the mail server
sending/receiving mail, over a designated, rDNS lookup IP. (AOL blocks if
it can't do a legitimate rDNS on the mail server). Due to the order of the
rules on our firewall, we found that our exchange server was going out over
a different port than what it was assigned. So, there wasn't a valid rDNS.
Once we changed the order of the rules, it started sending and recieving
over the designated IP.
Hope this helps!
"Bryan D. Weaver" <bryanw@xxxxxxxx> wrote in message
news:u2Yc3PEqGHA.220@xxxxxxxxxxxxxxxxxxxxxxx
Would you please go into a little more detail? Particularly on the
firewall rule. We are having the same problem. However ours is not
limited to AOL.
Bryan Weaver
"Kevin A" <kevina@xxxxxxxxxxx> wrote in message
news:ux$1KuOoGHA.1052@xxxxxxxxxxxxxxxxxxxxxxx
We solved it!
The problem was that a firewall rule was overriding the subsequent rule
which allowed the smtp traffic to leave over a specific port. There was
a problem with the rdns and the fact we were not sending from the IP
address we thought we were.
We moved the rule up in the chain and now it works.
Thanks for your help.
"Ward Flowers (MSFT)" <wardf@xxxxxxxxxxxxxxxxxxx> wrote in message
news:uWDfyDunGHA.1808@xxxxxxxxxxxxxxxxxxxxxxx
This is a possibility here as we can be sure based on the info thus far,
but they may have you on a blacklist for one reason or another...
Workaround: Since you have a SMTP server that can send to AOL, a
workaround would be to configure a connector for the @aol.com address
space to route through that server as a smart host. You would have to
set that SMTP server to allow relays from your Exchange connector box as
well.
Fix: You could get more answers form SMTP protocol logging of the
attempt to connect to AOL (821910 How to troubleshoot for Exchange
Server 2003 transport issues
http://support.microsoft.com/default.aspx?scid=kb;EN-US;821910 ) If
they are dropping the connection you could make contact to AOL support
to see if there is a possibility you are blacklisted and why.
--
Ward Flowers (MSFT)
Microsoft Exchange Support Engineer
This posting is provided "AS IS" with no warranties, and confers no
rights.
"Kevin A" <kevina@xxxxxxxxxxx> wrote in message
news:uq2gMLHnGHA.3784@xxxxxxxxxxxxxxxxxxxxxxx
It's already set to max. Another note. I have an SMTP server, that is
on the same subnet, sitting next to the Exchange Box, and it does NOT
have any problems sending to AOL.
"David Elfassy" <David@xxxxxxxxxxxxxxxxxx> wrote in message
news:uITo4GHnGHA.2148@xxxxxxxxxxxxxxxxxxxxxxx
Stop sending mail to AOL ;)
Can you increase Diagnostic Logging to see if you get more
information?
"Kevin A" <kevina@xxxxxxxxxxx> wrote in message
news:u0ogugDnGHA.2148@xxxxxxxxxxxxxxxxxxxxxxx
We started having a problem on the 27th of June. We can't seem to
establish
a connection with AOL anymore. We don't have any problems sending to
other
locations, just AOL. The error we're getting follows, any
suggestions would
be greatly appreciated:
Event Type: Warning
Event Source: MSExchangeTransport
Event Category: Connection Manager
Event ID: 4007
Date: 6/29/2006
Time: 5:35:30 PM
User: N/A
Computer: Exchange01
Description:
Message delivery to the host '205.188.158.121' failed while
delivering to
the remote domain 'aol.com' for the following reason: The connection
was
dropped due to an SMTP protocol event sink.
The SMTP verb which caused the error is 'quit'. The response from
the
remote server is ''.
.
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