You don't need ARC if you are munging the 5322.From, but if you are munging the 5322.From add a strict aligned DKIM signature, this makes it easy to filter and trust your lists traffic.
If you run multiple lists on the same domain, please do strict alignment between 5322.From AddrSpec and the 6376.Identifier (DKIM "i"). Only adding ARC without your own DKIM will make it harder for a lot of people, that are not yet ready to process ARC signatures. / Tobias -----Ursprüngliche Nachricht----- Von: mailop <mailop-boun...@mailop.org> Im Auftrag von Patrick Ben Koetter via mailop Gesendet: Freitag, 17. Februar 2023 17:08 An: mailop <mailop@mailop.org> Betreff: [mailop] Should mailing list messages be DKIM signed? (ARC / DKIM) Greetings, I'm about to setup a new mailing list server. It will use Mailman 3, which is able to add ARC signatures to incoming messages. The lists will also rewrite the From:-header and to match the lists name and domain. I'm unsure if outbound messages should also be DKIM signed or does it suffice to add ARC signatures? Regards, p@rick -- [*] sys4 AG https://sys4.de, +49 (89) 30 90 46 64 Schleißheimer Straße 26/MG,80333 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Marc Schiffbauer, Wolfgang Stief Aufsichtsratsvorsitzender: Florian Kirstein _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
