"Ok, I found an option in /etc/courier/imapd-ssl called TLS_STARTTLS_PROTOCOL.
It appears to set the minimum require protocol version; by default it is set to
TLS1. If I set it to SSL3 then Evolution can connect with TLS! So it seems
Evolution is trying to negotiate an SSL3 connection after all."
Might be similar to http:// bugzilla. gnome.org/ show_bug. cgi?id= 336543 or http:// bugzilla. gnome.org/ show_bug. cgi?id= 345135
GNOME #345135 has a comment mentionning:
"Ok, I found an option in /etc/courier/ imapd-ssl called TLS_STARTTLS_ PROTOCOL.
It appears to set the minimum require protocol version; by default it is set to
TLS1. If I set it to SSL3 then Evolution can connect with TLS! So it seems
Evolution is trying to negotiate an SSL3 connection after all."
Does that work for you too?