Security of an email server has nothing to do with secure transport of emails. If you run qmail, nobody will ever root your server. Sure they'll be able to in

Security of an email server has nothing to do with secure transport of emails. If you run qmail, nobody will ever root your server. Sure they'll be able to intercept and read your email, but they won't root your server! I did run qmail in 1998ish and it was quirky but rock solid. But that was coming from sendmail, which I'd never recommend. Now I'd say postfix is the way to go: quite secure and fully TLS capable.