[IMAP] MailClient.Accounts.ConnectionException: Failed opening connection to server.

All of a sudden getting  [IMAP]  MailClient.Accounts.ConnectionException: Failed opening connection to server.  Worked up until a couple days ago.  Has something changed in EMclient or Gmail server?

Fixed the problem by selecting "use SSL/TLS on special port (legacy).  Don’t believe I ever used that one before.