Il 28/09/2011 13:45, Noel Jones ha scritto:
You can use a check_client_access table with something like
unknown  PREPEND X-My-Custom-Header: Unknown client

and filter on that.

It works, thanks.

Probably better to install SpamAssassin.

I already use spamass-milter, but how can I achieve it with spamassassin?

Thanks,
Niccolò

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