Request - Thunderbird authconfig

[ScottPeterJohnson]

(This issue was imported from Gitea) lbouriez on March 14, 2022: Hello, Using FairMail i discovered authconfig (https://wiki.mozilla.org/Thunderbird:Autoconfiguration) Would it be possible to have this config file available somewhere in purelymail so we can add a cname to it ?

It seems pretty straight forward (https://www.axigen.com/documentation/auto-discovery-for-mozilla-thunderbird-via-imap-pop3-p49120013)