We have now updated the Sophos anti-virus on the server so we'll see what happens over the next week or two. If it still plays up, then we will try running without it for a week or two.
Thanks for the input. > -----Original Message----- > From: Ed Crowley [MVP] [mailto:[EMAIL PROTECTED] > Sent: 12 November 2003 01:19 > To: Exchange Discussions > Subject: RE: smtp receives but stops sending > > > Funny, I was thinking about Sybari Antigen. I think this > problem can occur > with many versions of many vendors' products. > > Ed Crowley MCSE+Internet MVP > Freelance E-Mail Philosopher > Protecting the world from PSTs and Bricked Backups!T > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Tony Hlabse > Sent: Tuesday, November 11, 2003 7:22 AM > To: Exchange Discussions > Subject: RE: smtp receives but stops sending > > If your using Trend-Micro as your Virus scanner, on my last > assignment they > had a simular issue. It ended up on how Trend was setup. > After tweaking > settings the relay server never locked up again. Took almost > a month to > track down. > > > From: "Mark Dewell" <[EMAIL PROTECTED]> > Reply-To: "Exchange Discussions" <[EMAIL PROTECTED]> > To: "Exchange Discussions" <[EMAIL PROTECTED]> > Subject: RE: smtp receives but stops sending > Date: Tue, 11 Nov 2003 12:20:48 -0000 > > We use UNIX boxes as our main email gateway/smarthost. > Messages are routed > to/from our back end exchange boxes to the unix boxes via an > exchange 2003 > front end server (which handles the anti-virus and anti-spam > filtering). > This > configuration means that the unix boxes deal with all routing > issues and are > the only boxes exposed to the internet. Our back end servers > can handle > internal message traffic (although they do also scan messages > for viruses) > > Ed, We will try running without the anti-virus scanning on > the front end > server, but with such an intermittant problem (may occur a > couple of times a > week and then not again for a couple of weeks) it is > difficult to know how > long a trail to give it. If this is an anti-virus issue then > I would expect > to get this problem with our backend servers which handle > more smtp traffic > (albeit only between themselves) and are running the same > anti-virus config. > > > -----Original Message----- > > From: Greg Brown [mailto:[EMAIL PROTECTED] > > Sent: 10 November > 2003 18:43 > To: Exchange Discussions > Subject: RE: smtp > receives but > stops sending > > > I am going to make a few assumptions > based on the > info > contained in this > thread thus far. > > 1)You have a MS SMTP server configured as a Smart Host for > an > Exchange > 2003 > server. In other words, you can install an instance > of > Exchange > as a front > end server, and I'm guessing you did not do this. > > 2)I'm also guessing that on said MS SMTP Smart Host you > have relaying > > restricted to ONLY the domains you list. This alleviates MS > > "confusion". > > 3)Anti-Spam operations are being conducted on this SMTP > server via GFI > > software. > > 4)In the properties of your SMTP Smart Host, you have not > > enabled > logging > via the check box, AND included all extended > properties. If a > time > threshold for delivery is not met, it will be logged here. > > Depending on > > your volume, place this file where there is ample storage. > > Also, be sure to > > check "unlimited file size". > > Remedy- > > IMHO, there may be 2 ways to fix this. First, double > check > your hard > coded > DNS server on the smart host. I know that in > native-mode AD, > > this should > only have your DDNS server listed. Your DDNS > server should > > be configured to > make the DNS call if it doesn't have it > in cache. I > ran into > this at the WS > level. What happened was a latency with > regards to delivery > that lasted > anywhere from 30 > minutes to several > days. > > Second, MS IIS SMTP is MICROSOFT! Build an EXACT duplicate > box, > configured > exactly as the box you now have. Give it a > test run between > > say 8-10 pm on > a slow night. I'll bet that fixes it. > Be sure ALL > logging > is enabled via > the SMTP properties page, > including extended > properties. I'm > guessing your > build may be bad, or > over time it has > degraded. > > Hope that helps. > > gb > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] Behalf Of > Tony Hlabse > > Sent: Monday, November 10, 2003 10:23 AM > To: Exchange > Discussions > > Subject: Re: smtp receives but stops sending > > > > Only > thing that > comes to mind is a disk space issue. Will > listen to see > what > the final > outcome is. > > > > From: "Mark Dewell" <[EMAIL PROTECTED]> > Reply-To: "Exchange > Discussions" <[EMAIL PROTECTED]> > To: "Exchange Discussions" > <[EMAIL PROTECTED]> > Subject: smtp receives but stops > sending > Date: > Mon, 10 Nov 2003 16:56:51 -0000 > > 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 server 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 : [EMAIL PROTECTED] > > >--- > > ---< URL : http://homepages.uel.ac.uk/1278 > > >--- > > > > < Practice random kindness and senseless acts of beauty > (Anne > Herbert) > > > > > > _________________________________________________________________ > > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > > Web Interface: > > http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&t > ext_mode=&lang > =english > To unsubscribe: mailto:[EMAIL PROTECTED] > Exchange List admin: [EMAIL PROTECTED] > > _________________________________________________________________ > MSN Shopping upgraded for the holidays! 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