Many people have set up email systems on their own domain names. I also use Zoho's domain email service for my main site lantian.pub. However, a major drawback of using domain email is that it's difficult to remember server addresses for POP3, IMAP, SMTP, etc. When reinstalling systems or email clients requires reconfiguration, you have to log back into the email system to check server addresses, which is quite troublesome. If you use the Thunderbird email client, you may notice during account setup that Thunderbird has a "Retrieve settings from email provider" process. This essentially requests an XML document from the domain's web server containing email server configurations. By manually creating this configuration file and hosting it on your web server,...