Hi, I just wanted to add to this thread a trouble I hit with SMTP in the Admin panel.
No matter what combinations of settings I used, or providers I used, even following the various example email SMTP setups in this thread it would always result in this line in the logs:
I ended up disabling the "enable" option, saving, enabling the "enable" option, saving, then trying to send a test email and it worked. Without adjusting any further settings. Was starting to annoy me but glad it is resolved. Tried and tested "turn if off and on again" to the rescue.