When I read about email being too hard, I hear about configuration headaches, deliverability, and spam, but the real reason that I outsource email is because of

When I read about email being too hard, I hear about configuration headaches, deliverability, and spam, but the real reason that I outsource email is because of security. The horrible history of MTA security drives me into a very conservative mail strategy. Short of DJB devoting his life to qmail, I don't know if this problem can be solved.