> > 1.) SPAMCop, support for this is built into almost all MDA/MTAs. All > > it takes is a DNS query per message. We've found this blocks almost > > all SPAM, and anything that comes through can be easily reported. > > This is Morrison's only anti-SPAM mechanism and we get almost none. > What false positive problems have you had with SpamCop? Zero. > Have you had to whitelist any addresses? No.