Not all that surprising.  The user mailbox files are numerous, maybe in the 
1000's, and are constantly growing and shrinking as mail comes in and then 
is POPped out, asynchronously.  Fragmentation to the max.  Attachements of 
course make the in/out worse.  In spite of MS's early stance the NTFS 
doesn't need defragmenting (typical MS political BS), Norton's speeddisk 
and Exec Software's Diskkeeper are key admin tools.

Have you put the imail\spool directory and the \maildomains on the same 
partition?  If so, you're putting the Imail logging files and the user 
mailboxes on the same partition.  I think it would be better to keep these 
on different partitions.

Esp with user's leaving their msgs in their mailbox and accesssing them 
from Web Msging, a web msging visitor would cause Imail to scramble all 
over the disk to pull together 25 or 50 msgs headers per HTML page.

In fact, I've never seen this discussion here, so I'll throw this out for 
starters, as what I think would be a best practice partitioning of an Imail 
server:

a:   Emergency Repair Diskette!!! vbg
c:   system (NT)
d:   programs (including Imail + its logging)
e:   maildomains-1
f:   maildomains-2

Len



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