RE: Front End Server hold all incoming email

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Date: Wed, 13 Oct 2004 16:54:19 GMT

Hi Mike,
That is an interesting one. I have some more questions for you that may
point you in the right direction.

-when problem happens, does outgoing mail to internet and all other
possible directions flow fine (not sure how you're environment is set up)
and it's just FE to BE where mail is backed up? If it was something to do
with a resource bottleneck or file locking I would expect it to happen in
both directions.

-when this happens, if you right click on the queue that is backed up and
hit properties, what is the diagnostic information at the bottom of the
dialogue box? This will often give a reason why we are not passing mail
over this connection.

-are we running any file-level antivirus, anti-spans or Exchange aware
antivirus software on the box? Anything that may hook into SMTP? If you are
doing file-level AV, have you excluded the mairoot folder?

-can you telnet to the backend server from the front-end over port 25 when
problem occurs (I'm guessing you probably can but good to check)?

-When you restart Exchange Services are you including the SMTP service (not
the virtual server)?

-Anything that happens on Tuesday, like maintenance, that may be of
importance?

- I'd turn all transport logging to max (or to debug level 7 in the
registry) and when problem recurs then restart SMTP and see if you get any
warning's errors.

Darin Roulston
Microsoft

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Hello all, 
This is the second time this has happened. Both times it happened on a 
Tuesday evening. 
Here is the situation: 
We have an Exchange Front-End server that processes all incoming and 
outgoing email. Sometime Tuesday evening the incoming email stops getting 
sent to the back-end servers. When I come in the next day there are over 
1000 
emails in the queue. I tried restarting the virtual server, restarting all 
of 
the Exchange services, and nothing works. 
However, When I finally give up and reboot the server the mail flows 
imediately after I tell it to restart. During it's shutdown cycle something 
kicks in and it starts flowing again. Once the reboot completes, it 
finishes 
the queued mail and is fine for a week. 
Any ideas? 
Mike 

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