Am Sat, 31 Aug 2024 18:29:17 +0200 schrieb "T. S." <tfasnetamot at emailn.eu>: > Is somethings similar available for GPG/PGP? I don't know about such an implementation, but if you want to create one, everybody can publish RFCs at IETF, so feel free to create such a technology. If you want something unofficial, use the X- headers.