Sean Donelan <sean@donelan.com> writes:
I'm not that interested in SSL for web servers, but I have noticed a gradual increase in the number of mail servers willing to STARTTLS with mine. I was experimenting with trying to verify some of the certificates presented, its not real security, but makes the logs cleaner.
Most of us who are willing to opportunistically do STARTTLS are using self-signed certificates anyway. We do this for many reasons; chief among the reasons I do so are: 1) More encrypted traffic running around the Internet is a _good thing_ 2) Even if the contents of my email is PGP-encrypted, headers and transactions can still be passively monitored and collected. This is sufficient for drawing relationship graphs. Opportunistic TLS fixes this problem. Note that "verifying the identity of the guy on the other end and thus eliminating man-in-the-middle attacks on my email" is not on the list. STARTTLS-capable MTAs vary in their ability to follow certificate chains anyway... ---Rob