Yes SSL can be enabled for sending and receiving email, but you must use one of the following mail server names which are enabled with SSL certificates:
If you try to use SSL and your own mail domain, like mail.<domain-name> (e.g. mail.mydomain.co.nz), then SSL will fail and your email client will give you SSL domain not matched errors.
In this case, please turn SSL off, or use one of our SSL enabled domains above.
See this article for General Email Settings.
Last Update: December 14, 2018