https://manpages.ubuntu.com/manpages/noble/de/man7/mailaddr.7.html
Ubuntu Manpage: mailaddr - beschreibt E-Mail-Adressen
beschreibt E-Mail-Adressen
e mailubuntumanpagebeschreibtadressen
https://manpages.ubuntu.com/manpages/focal/man7/mailaddr.7.html
Ubuntu Manpage: mailaddr - mail addressing description
mail addressing description
ubuntumanpagemailaddressingdescription