On Thu, 3 Mar 2016, Tony Galecki via Info-cyrus wrote: > Lots of fiddling arround, tls_versions: ssl3 tls1_2 in the imapd.conf > file also fixed the issue. However, some clients (notably older Mac Mail > clients) were not able to connect. Don't you want to include tls1_0 and tls1_1 in the list? Here at OSU, we use the defaults, "tls_versions: tls1_0 tls1_1 tls1_2". Andy