RE: smtp receives but stops sending

  • From: "Mark Dewell" <M.Dewell@xxxxxxxxx>
  • To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
  • Date: Mon, 10 Nov 2003 17:22:28 -0000

We are not currently doing any disk/file scanning on this server, just
scanning the email messages (we use Sophos for anti-virus, GFI is just
providing anti-spam and has only been on the server since June 2003)
        -----Original Message-----
        From: Chris Wall [mailto:Chris.Wall@xxxxxxxxxxxxxxxxxxx] 
        Sent: 10 November 2003 17:11
        To: [ExchangeList]
        Subject: [exchangelist] RE: smtp receives but stops sending
        
        
        http://www.MSExchange.org/
        
        Mark,
        
           I have been experiencing similar issues running GFI for my
organization.  Have you verified that your virus software is not scanning the
INETPUB directory?  This seemed to resolve our issue.
         
        Chris
                -----Original Message-----
                From: Mark Dewell [mailto:M.Dewell@xxxxxxxxx] 
                Sent: Monday, November 10, 2003 11:52 AM
                To: [ExchangeList]
                Subject: [exchangelist] smtp receives but stops sending
                
                
                http://www.MSExchange.org/
                
                Can anyone shed any light on the following behavior. We are
running Exchange 2003 and during normal operation the smtp queues will be
empty (apart from the occasionally message or 2 in transit). However, once or
twice a week the smtp service on our front end seems to stop delivering
messages, but does continue to accept them, with the result that if left
unchecked we get a backlog of thousands of messages in the 'Messages pending
submission' queue. To resolve this we have to restart the smtp service, which
is normally not possible. So we instead have to set the service to 'disabled'
and then restart the entire server. The queue contents can then be moved out
to a temporary location and the smtp service restarted. If we restart without
clearing the original queue contents the IIS service often crashes, but if we
start up with an empty queue we can feed the backlog back into the system a
thousand at a time via the pickup folder and this will successfully deliver
them. So this seems to imply that it is not the queue/message content that is
causing the problem.
                 
                We originally saw this problem with Exchange 2000, but
successive service packs and now Ex2003 have not fixed the problem. It only
seems to happen at busy periods, like the Autumn term of a University. It ran
without a hiccup over the summer break.
                We have a very fast network with several AD global catalogs
available so I don't believe this to be an active directory related problem,
but.....
                We are also running GFI MailEssentials on this server, but
only since June and the problem has been occuring on and off for the last
couple of years. Sophos Mail Monitor Anti-Virus also runs on this and all our
other Exchange servers, but only this one front end server has the problem.
                 
                Is anyone having a similar problems? 
                 
                Any ideas how we can investigate this further (The events
logs show no errors during the time period this occurs).
                 
                ---<  Mark Dewell, University of East London, Dagenham,
Essex, UK  >---
                ---<  Email        : M.Dewell@xxxxxxxxx
>---
                ---<  URL          : http://homepages.uel.ac.uk/1278
>---
                
                < Practice random kindness and senseless acts of beauty (Anne
Herbert) >
                  
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