IPA-EPN: test using SSL against port 465
Enable the postfix SSL listener on port 465. The certifiates
and other configuration is already in place.
Test that sending mail is successful.
Fixes: https://pagure.io/freeipa/issue/3687
Signed-off-by: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Francois Cami <fcami@redhat.com>