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Eduardo M KALINOWSKI: It is possible but it's not a dovecot job.

Ak, ok!

Thunderbird has a protocol to get the settings but is DNS/xml related ( and is pretty normal because it not know the name of the mail server before ) https://developer.mozilla.org/en-US/docs/Mozilla/Thunderbird/Autoconfigurati... You need to serve an xml file on your webserver on the same domain.

MfG Robert Schetterer: see https://automx.org/en/ https://blog.sys4.de/outlook-2013-special-use-mit-dovecot-de.html https://wiki.dovecot.org/MailboxSettings

Perfect!

Many thanks to all!

Davide