Jinak pro autora: dobre to je, jen takova drobnost - chtelo by to jeste nastavit a (pravidelne stahovat) PublicSuffixList (https://en.wikipedia.org/wiki/Public_Suffix_List) - viz treba zde: (https://www.stevejenkins.com/blog/2015/03/installing-opendmarc-rpm-via-yum-with-postfix-or-sendmail-for-rhel-centos-fedora/)
Jo a prichazi ARC. Brace for impact :)