I get over 100 spam messages DAILY. I would LOVE for this to stop.
The spammers won in this battle.
My response, just use Gmail. It filters out all of the spam.
I get way too much spam to be able to check my spam folder. All I can
do is run searches for topics that a spammer wouldn't use, but I or a
friend would.
The issue with those "postmaster" emails is that I email my friend and
give a 10 MB attachment and await him to do some improvements and send
it back too me. Email bounces back, marked as spam in Gmail, and I
think he received it while he thinks I never sent it (we only find out
after a long time).
Needed Gmail feature: if an email contains text you have sent to
someone, it should not be marked as spam.