Re: @DougS I doubt it increases security
It happened to me once that of the account I setup up on a new phone, luckily the "one to use when you'll know you'll get spammed", wasn't properly set up to use SSL/TLS.
After I used it through an hotel wifi, someone was sniffing data (I guess the hotel network was compromised), cracked the account password, and immediately tried to use it to spam through my server (it looked it didn't access the account through IMAP or POP, anyway, he would have found just mailing lists messages, luckily...).
Thereby if you believe a proper SSL/TLS setup is only useful to guard against state level attackers, I would suggest you to reconsider how many crooks are competent enough to perform relatively sophisticated attacks. Against most three letters agencies, probably SSL/TLS is too weak already.