Question : Exchange 2007 is not receiving any incoming email

We're running Exchange 2007 with front end services hosted by an outside company.  This morning I received complaints that no one has received any internal/external email since yesterday at 5:15.  I restarted the Exhange services and checked the front end server queue. The queue had 200 emails so I forced a restart of delivery.  The total number of messages begun to decrease so I assumed that Exchange started processing them.  After all the items had been processed I checked several mailboxes and there was still no new email.  I ran a Message Tracking Request for all inbound email and it found no email for today's date.  Two hundred emails have vanished!  Any suggestions would be appreciated.

Answer : Exchange 2007 is not receiving any incoming email

The mystery has been solved.

The problem was MailSecurity version 12.  For some unknown reason MailSecurity was scanning emails then moving them to the GFI FailedMails folder instead of scanning and releasing them.  That folder can be found at C:\Program Files (x86)\GFI\ContentSecurity\MailSecurity\FailedMails folder.

The resolution:  I upgraded MailSecurity to the latest version.  The emails in the FailedMail folder I moved to the C:\Program Files\Microsoft\Exchange Server\TransportRoles\Pickup folder and Exchange picked up the emails and processes them.

I hope you fing this solution helpful.  It required calls to both GFI and Microsoft Exchange 2007 support team to finally resolve this issue.