> postfix + opendkim + smtp + tls + spamassassin + fail2ban is not too difficult a setup to achieve If I was running a mail service company of some sort then o

> postfix + opendkim + smtp + tls + spamassassin + fail2ban is not too difficult a setup to achieve If I was running a mail service company of some sort then of course it's easy enough to do this. Unfortunately time, effort, focus and money is best spent elsewhere in the company. Maybe one day, but for now it's far easier to scratch out 3 of the 4 resources by throwing money at the companies that do this sort of work. Especially when you start looking at features like email->HTTP POST request with parsing built in.