ByEzel
Hello, it is recommended to set it to Full, and then set up SSL on the aapanel website. Then use https to access the site after a while
Of course, the subdomain A record of the website needs to enable proxy
At the same time, the subdomain A record used by the mx record of the website and the mail server needs to be separated, and the proxy cannot be enabled for the A record of the mail server.
The SSL of the website should not affect smtp, which uses the SSL of the mail server and does not use the SSL of the website