Problem with amavis

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Hi,

I'm using the Maia mailguarg and I installed it using this howto:
http://www.isp-control.net/documentation..._omega_rc3

For some reason today the clamscan process started running all the time. It's running 2 processes ran by amavis almost all the time. The problem is that it's using a lot of CPU resources, our load average jumps at 3-5 constantly.

As far as I can remember I haven't done any changes to the system.