Jon Gabrielson wrote: > > 3) switch from postfix to exim, so that I can block spam at smtp time. > (If someone has tried this, does this have any effect on the > total amount of spam?)
Better option is to use an SMTP proxy in front of Postfix, or use a replacement for its SMTP service module. For qmail for instance, there is a nice package called 'mailfront' which is a filtering qmail-smtpd replacement.
