>I am also having trouble with what would appear to be SMTP bouncing off and
>on.

>Plenty of processing power, RAM and disk space.

famous last words!  vbg

>Periodically, individual domains will stop accepting mail,

what's the Imail log say about this??

>and the messages will bounce back to the sender.

what's the reason for rejecting?  either in the msg or in the log (if you 
have one or can turn it one) of the mail client pgm?

Are these senders sending from local Imail accounts or are they coming in 
from remote mail servers?

>BUT I have to stop and re-start the SMTP service in the control panel,
>if I try it in the IMail administrator panel it hangs on stopping the
>service and never changes to stopped, even thought the service shows as
>stopped in the NT services control panel. I re-start it in the NT services
>control panel, everything's up and running, and the imail control panel
>still says stopping...

I've never had to do that (with Cold Fusion, yes, with Imail, no).  Sure 
sounds suspicious, doesn't it?

When your machine gets into one of these states, I'd look in the NT Task 
Manager and see what the CPU load is, how many SMTP and SMPTD processes are 
listed, look in the Imail control panel Queue tab. and look in the log file.

Do some of these domains have domain-level filtering rules??

Len


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