Of course you are right! It should either be "a@b"@mydomain.tld or a."@".b...@mydomain.tld, both would be valid.
Sadly, it does not change the outcome. Even with a pure "@"@mydomain.tld, Dovecot splits it into the empty string user (%n) and @mydomain.tld as the domain part (%d). Am 01-Mar-18 um 16:48 schrieb LuKreme: > On Mar 1, 2018, at 05:07, Philipp Berger <newslett...@philippberger.de> wrote: >> mail address like a"@"b...@mydomain.tld, which by RFC should be valid > Shouldn't it be "a@b"@mydoamin.tld ? >