Hi,I've been having a lot of trouble with an Exchange 2007 box. Incoming email stopped on Thursday, I phone PSS who found Rollup 4 had installed over Roll up 3. Removing both of these and reapplying Rollup4 fixed the problem until Friday morning when all mail stopped, internal, incoming and outgoing. Various tests showed this time it was the Syamnatec Mail Security software blocking everything. All the email could be seen in the queues, mail submitted manually via Telnet was queued also.Removing the Antivirus software going everything flowing again.Today incoming email has stopped again. Internal email is still working as is outgoing. Looking at the queues shows no mail in any queues. Mail submitted to SMTP locally via telnet is delivered.Message tracking has no record of any incoming emails after 11:57pm last night. I have of course restarted all the services but not the box itself. It is a DC and a GC and is doing file shares. Loads of space on the log and database arrays.Anybody got any ideas as to what is wrong with this server?

Hi Again,Another call to PSS but I'm sorted. Problem was lack of space on the drive holding the incoming email queue database. Exchange 2007 requires at least 10GB, thats right 10GB, free space on this drive or you run the risk of resource problems. A close check of the event logs shows warnings from the MSExchangeTransport with event 15002 saying resource pressure was at medium high and it had shutdown inbound mail submission from the Internet because it was short of resources. I had 6Gb free space on the drive in question. PSS advise if the free space drops below 4Gb you can not even telnet to the SMTP service as that shuts down completely.To move the database to new location you must stop the Microsoft Exchange Transport service and edit the EdgeTransport.Exe.Config file (with notepad) in the C:\Program Files\Microsoft\Exchange Server\bin folder.Edit the QueueDatabasePath and QueueDatabaseLoggingPath values to point to the new folder location and hey presto Exchange creates a new database when the Microsoft Exchange Transport Service is restarted.I did not have to move any files as my server had shutdown inbound email but you may want to check if this is not th ecase with your server. The PSS engineer told me if exchange crashed it is possible to take the incoming queue edb database (and logs?) and copy it to the repaired/restored server to recover mail in the inbound queue at failure.Thanks anyway guys, I hope this post helps someone in the future.CheersRay