What this script does

• Creates a "mail/" directory into your default Plesk hosting page.
• Adds /apple, /autodiscover and /Autodiscover aliases that point to the mail/ dir, for Apple and Outlook.
• Accordingly to the configuration, adds the required .xml configuration files into mail/.
• Adds a CNAME to all your domains for Thunderbird autoconfig : autoconfig > [hostname].tld. (If your DNS zone is not managed into Plesk, make sure to add this entry into it.) This domain must not actually exist in your Plesk, in order to be redirected to the default hosting.
• Changes the default DNS zone to add the autoconfig cname.