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Email Not being delivered to mailbox

We have an Exchange 2000 server.  Today I noticed that no mail was being delivered to the mailboxes.  I checked to make sure that all the services are running, the hard drive is not out of space and the databases are mounted.  After reviewing all this I took a look at the :\program files\exchsrvr\mailroot\vsi 1\queue folder and noticed that there are currently 86 .eml files ranging from 216mb to 4kb.  Any suggestions?
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Check event log any errors there?

Author

Commented:
No errors in the event viewer, and I'm noticing a lot of disk activity on the data drive for the server where the database files are located.

Commented:
Have you tied to restart your smtp server? Or manually resubmiiting all the emails in the queue?
I would reboot server and then if it won't solve issue check your DNS

Author

Commented:
Server has been restarted serveral times so far.  I've tried to manually resubmit a few of the e-mails to no avail.  DNS is working fine.

Commented:
Have you tried taking your server offline to see if there will still be activity on the database drive? If no, then you are hacked or being used as an open relay, if it still continous, then it's kinda good news.

Author

Commented:
It's not an open relay issue.  I've checked.  And I don't see any out going e-mails from the firewall so I wouldn't say that it's a hack issue.  I have taken the server offline and the disk activity stops.  I'm thinking it might have something to do with the SMTP service,  maybe corrupt.
Commented:
Try installing new virtual smtp server, see if that will help.

Author

Commented:
Ok, here is what I found out.  Late last night one of the knuckle headed sales people at my office attached a 160mb pdf file to an e-mail and sent it out to 30 different people.  I've tried to delete it from the queue serveral times but it seems to keep coming back.  I took a look at his outbox in Outlook to make sure it wasn't stuck.  Everytime I restart the server the messages keep trying to send out, hench the SMTP freezes up.

Author

Commented:
BTW, I never heard of installing a new virtual smtp server to replace the default smtp virtual server.  I didn't think you could delete the default.  Any instructions on how to do this?

Author

Commented:
Ok.  The fix was: I stopped the Infromation Store service and stopped the Default Virtual SMTP Server.  Then I disabled the network connection.  I then restarted the IS service and DVSS.  All 30 messages queued up in the DVSS as expected.  I waited until the service could not make the connection then went in and deleted each email from each queue (they were all the same message from the same knuckle headed sale guy).  I then stopped and restarted both the IS service and DVSS to make sure they wouldn't come back then enabled the network connection.  Server is working fine now.  Thanks for all of the suggestions.

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