Server going deaf...

Not sure if this is really a networking issue or a mail server issue.
Last week, our server box started going deaf. I first noticed it when my Apple Mail indicated that my mail accounts were offline. Then my customers started calling saying they were having problems accessing their email as well. Rebooted the machine, and all was well for about 10 minutes.
Here are my observations:
Server seems to go completely deaf about once every 15 minutes for about 30 seconds duration.
ARD loses it's connection to the server, email times out, websites aren't served during these outages.
Other servers on the same WAN segment do not go deaf.
Standing physically at the machine and watching Activity Viewer, I see no one process that is holding anything up.
Anybody run into this or have suggestions as to how to track down and fix?

Still no resolution to this problem.
Things went back to normal for a few weeks, now today, it's back to going deaf again, now every 30 seconds for a minute or more. Causing user's email to timeout.
HELP PLEASE! I'm about ready to reformat and set it all back up from scratch again, a full day's worth of work.

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Please do help me........ how to resolve this.
Thanks.

Hi,
You could try increasing the java heap size, though sometimes an issue can occur if you are trying to delete a member when a workflow process has started, do you have one running?
Cheers
John
http://john-goodwin.blogspot.com/

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Repost
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Server going deaf...

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