.STM too large Exchange 2000 Standard

I have an Exchange 2000 Server Standard with following data within its store:

priv1.edb  7.9 GB
priv1.stm  7 GB

pub1.edb  7 MB
pub1.stm  7 MB

I have never noticed .STM files being this large before and it looks like an issue to me.  We have already defragmented the store with no improvement.

Some things of note:
-This server already hit the 16GB mark due to SPAM and hung the server, this was about 4 months ago
-This server is also running GFI MailEssentials 8
-Looking at the mailboxes I would guess there to only be about 5 GB of data accounted for
-Circular logging in enabled

My Plan moving forward:
-I was going to export all mailboxes to PST
-Delete the current information store
-Created a new store
-Import the PST into the new store

Any suggestions, or comments on this issue or my plan would be great.
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I would disable Circular Logging and do a full backup up of your server; that should take care of the problem. Is there any *good* reason why you have Circular Logging enabled?

reduction in space that the log files consume I imagine.

The STM file will slowly enter the exchange database on its own.  Usually once the mail is read.  If you have large amounts of spam that is moved to a folder but is not read, it can conceivably stay in the STM file.  I would delete unread emails and express to users to do the same if it is spam.  
Actually, the best way to reduce log file space is to do as I mentioned b4, disable circular logging and perform a full backup on a regular basis, thereby deleting all the logs, including .STM. What you are suggesting would be an Administrative nightmare and take up way too much time.

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Corp616Author Commented:
The way I understand it the Exchange database limits include both .edb and .stm is that correct?  Is there a utilty out that that monitors database size and growth?
I know there are utilities out there that do what you are asking but I don't know any of the names. Sorry.

I saw a similar post on E-E a while back.  It ended up being that their anti-virus application was scanning their Exchange databases (.edb and .stm).  Generally the STM is only larger than the EDB in Internet-intensive organizations.  If a company sends a large amount of internal mail through Outlook, they should have a larger .edb.  If they use POP3 clients or OWA clients, the STM is going to be sizable.
Corp616Author Commented:
I exported all mailboxes to PST and created a new information store then imported the PST's.  This resloved the issue.
Glad that it worked as you mentioned in your question.  Remember to keep an eye on it and keep a handle on it!  Note that when you export and import  (exmerge, Outlook export, etc), yo do lose the Single Instance Storage....but if your mailboxes are all less then 16GB, life is good.

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