>I use postfix and spamassassin, and I have no problem. I don't rewrite >headers. I don't whitelist senders. ... etc.
It is likely you are not aware of the problem I am speaking of then as
Spamassassin does NOT recognize locally sent mail the way it "should", it uses
a test called NO_RELAYS for locally sent postfix mail. I don't want to process
the local mail at all.
So, "problem" depends on what you are trying to accomplish.
