I’ve tried everything I can think of, and all combinations of settings, passwords, etc.
Apple mail uses smtp.mail.me.com:587, with SSL. I don’t see an SSL setting under System > eMail settings > eMail settings.
I’ve gotten various SMTP errors, including 550, 530, 535. The test emails always bounce.
Please tell me specifically what settings to use for each parameter. This doesn’t seem it should be difficult!