@adrianluff@thaddeus doesn't that defeat the point of running your own mail server, ie, nobody else receives your email?
What happens if your server is down when a mail gets sent without a backup solution like that? Doesn't the sender's provider retry?
In the last few months critical, show-stopping bugs have been revealed in Secure Transport, GnuTLS, and OpenSSL. I wonder how many vulns are in use by the NSA (and I firmly believe they were all in use, if not introduced, by the NSA).