[cbj4074]

Thanks for sharing your insights, Till.

I like Amavis, too, and I have no desire to replace it.

The server has only 1GB of physical memory, which, I realize, is hardly sufficient for most environments, but this is a development server on which we would prefer not to spend more money than absolutely necessary.

We do use custom SpamAssassin rule-sets; it makes sense that this would contribute to higher memory usage.

I have changed the maximum number of concurrent Amavisd-new processes from the default (2) to 1.

For anyone else who is interested in making the same change, this is how it's done:

/etc/amavis/conf.d/50-user

$max_servers = 1;

/etc/postfix/master.cf

# The number here MUST match the amavis configuration value.
amavis unix - - - - 1 smtp

All of this said, I'm still not sure how to prevent the amavis issue that I described in my second post. Any ideas there, Till?

Thanks again!