Gordon,

One thing you might consider doing is having the Imail queue directory 
(common to all virtual domains) which is  driveX:\imail\spool on a disk 
separate from what we call here the "usr" directory, below which all the 
mail domains have their private trees, ie, the mail user's mailboxes:

disk1:\imail\spool

disk2:\usr\virtdomain1
           \virtdomain2
           \virtdomain3
           \virtdomain4

If you could put disk1 and disk2 on different SCSI controllers with 64 or 
128 megs of cache (see the Asus SCSI cards), even better.  I think you will 
have horrendous traffic on disk2 because the all users will leave all their 
mail on the server, never downloading, and way too infrequently deleting it.

Also, the mailbox disk will become horribly fragmented as msgs are 
continuously created and deleted, so having DiskKeeper running continuously 
will keep the fragmentation down.

Len

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