I also receive timeouts with a sililar problem but with domains sending to
me. I see the log entries showing the connection, the mail from, the mail to
and the "timeout" and the quit. Nothing has changed in our environment all of
a sudden I'm getting compolaints form outside domains trying to email me. Any
insight will be helpful. No we did not make any changes nor did we install
anything.
[quoted text, click to view] "nova3uk" wrote:
> I have seen lots of posts about this error, but there are so many
> variations of which none has solved my problem i have decided to start
> my own topic, as I really could do with some help! :(
>
> I have a number of windows servers which have been trundling along for
> months sending emails without so much as a hiccup, then a few days ago
> there queue folders began jamming up, and nothing seemed to send
> properly. Whether the mail is to a local server or a remote one makes
> no difference.
>
> After days of investigation the problem is that it makes its connection
> without any trouble, send the EHLO, and starts to send the mail but at
> the point of sending DATA it just stops, and eventually the remote
> server drops the connection with a timeout.
>
> This is happening consistantly, with mail to any domain. I know my ip
> is not on a blacklist, and i have even tested sending it to another
> remote server of my own which has no blacklisting rules, and the same
> thing occurs.
>
> The problem has happend at the same time, to at least 3 servers all
> configured to be there own DNS servers, and using there own DNS. The
> errors logged in event viewer show this same error for every message.
>
> These servers were running perfectly for a number of months, and i
> haven't changed a thing.
>
> I can only think of two posibilities:
>
> 1. Some windows update that has auto installed and has got a bug
> (unlikely)
>
> 2. My firewall (CISCO PIX) or my Switch 3COM is causing me troubles.
>
> I have investigated the possible problems with the PIX, and disabled
> fixup smtp as suggested by MS, and Cisco, although the pix is runnin on
> software version 6+ so this error is unlikley in any case.
>
> Interestingly, if i telnet in or out to any one of these boxes i can
> send an email without any problem at all, I get no disconnection, and
> no errors of any kind. I can even use many lines on purpose to send the
> email as a means of testing the fixup smtp really is disabled.
>
> I have not changed the pix configuration for weeks, so I cannot see why
> it could just begin misbehaving.
>
> If any oen has any ideas at all, I would be very grateful to hear
> them!!
>
> Thanks!
>
