>I setup a test Imail server using Quad 450, 512MB RAM, SQL, 4K users

that's a lot of box for just 4K users.

>  - I have noticed that I will have to stop/start the pop and webmsg 
> every so often...

no news there. iwebmsg has difficulties on some boxes.

pop service, however, ime, is very reliable, as is SMTP.

So it sounds like something isn't quite right on your box, but I 
haven't a clue how to determine what.

>It varies actually ( 1hour, 2hour - have not gone a day w/o 
>restarting the services) The performance monitor shows CPU is less 
>than 33% at any time

I bet your avg through working hours is under 10% CPU load. Heavy 
iwebmsg'ing will up that a lot.

>The only thing is that we have 4 people set as system admin and they 
>may be changing accounts.... Is there a limit on the webmesg access?

4 iwebmsg sessions is not many compared to the 500 or so I think 
Imail can support out of the box.

>BTW, I have a separate box running sendmail handling all outgoing 
>messages, but if people are using webmesg, the imail server directly sends it.

I don't follow you.  Imail either delivers all mail to the remote 
server addressed in the message headers or it can be set to send all 
its outgoing through a gateway. It doesn't matter if the outgoing 
mail originates in SMTP or iwebmsg.  I recommend having Imail send 
through through your sendmail gateway. Sendmail then would relay 
Imail's outgoing.

>Should I have the Imail server send all to our sendmail box?

yes, that's what we do with IMGate.

>I have all message coming directly to the imail server.

You could use the sendmail box as the MX for Imail, and relay the 
incoming to Imail. In IMGate, we have postfix do this after doing all 
kinds of mail abuse defenses.

Len

http://BIND8NT.MEIway.com : Binary for ISC BIND 8.2.3 for NT4 & W2K
http://IMGate.MEIway.com  : Build free, hi-perf, anti-spam mail gateways


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