If the QR code is just another header added to the mail, you'll need support in every MUA to display this QR in a way that could be scanned easily. Adding this to multiple MUAs is much more unlikely than adding support for DKIM/DMARC checking in MUAs and prominently displaying these authentication results, which would get the same level of securtiy with already existing standards.
-- Thomas Mechtersheimer - Necklenbroicher Str. 45a - D-40667 Meerbusch - Germany EMail: thom...@wupper.com IRC-Nick: Mechti Of course I'm crazy, but that doesn't mean I'm wrong. I'm mad but not ill. _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop