[IMail Forum] Capacity Planning for Imail?

[Young, Kip W]

Hello all,   I’m currently tasked with hosting email for approximately 125,000 users across roughly 5000+ domains in the near future.  Is anyone out there hosting this amount of users/domains using IMail?  If so what are the machine specs that you currently use?  One note, we are utilizing 2 servers as smtp gateways for offloading Virus and Spam processing.  We aren’t tightly filtering the spam so a lot of it will get past the gateways.  Here are the specs we currently have for an ednpoint mail server:   4 Proc 2.0 Ghz Xeon (hyper-threading available) 4GB of RAM 5 X 72GB in RAID 0 Windows 2003 Standard Edition Dual Intel Pro 100/S teamed NICS   Webmail will be used pretty heavily with the KillerWebMail templates.  There is also a high probability that at least 20%-30% of the 125,000 users are stale accounts that are no longer being used. If anyone has tips on identifying stale users other than the Dir commands in dos that would be awesome…   Thanks in advance for the help!   Kip Young, MCSE – Manager of Network Operations Reynolds Web Solutions 214-239-4131