We ran our own mail server for years using linux and a spam filtering
software I can't remember.
While I would prefer to have my email on my own box the abilities of Gmail
are pretty amazing.
I see far less spam than before what I do see is a bunch of people that
don't know their own email address giving my email to their friends,
school, kids school, car dealership, accountant (yes got someones tax
return), pharmacy notifications. My biggest gripe is the number of
companies that don't conduct email verification before signing someone up
for something.
Of course if I would just pay for the services to host my domains email
addresses then I would not have to deal with this instead of spoofing the
outbound address.
BTW a company that I conduct contract work for uses Gmail and it works
great as well, but has many of the features to administer users content
such as the required signature, logo, required photo ect.
But all of this is quite off topic for the list as it seems to work for
gmail, yahoo ect.
Lin N4YCI