Daniel L. Miller put forth on 3/2/2010 1:18 AM: > OK - I'm an idiot. I'll just admit that up front and get it out of the > way. > > Now that that's settled, what is the difference between "SSL" and "TLS" > in a MUA - particularly Thunderbird - in a Postfix context? > > I would have sworn I used to use Thunderbird with "SSL" specified and > connected to my Postfix servers fine. Now, I can only connect in "TLS" > mode. What did I break?
It's unlikely you'd forget setting up SSL. You would have likely created a self signed server certificate and would have installed it on all clients connecting to the server, just as must be done with web browsers connecting to a secure site for the first time. You've likely been using STARTTLS only, which doesn't require a key exchange as SSL/TLS does. STARTTLS != TLS. -- Stan
