Tobias, * Tobias Fiebig via mailop <[email protected]>: > fyi, i am currently debugging some deliverability issues with > outlook.com (mails queued, but seem to not be delivered). > > After getting my hands on an EML, i saw that the messages get > quarrantined, and show for a DKIM failure. > > The messages are triple-signed (SHA1, SHA256, ED25519). The former two > validate correctly, but the latter signature results in a: > > header.d=acsac.org;dkim=fail (signature syntax error) > > Removing the ed25519 seems to help; Also, no indicators on the dashboard for > the IPs, all in good standing, and can also deliver flawlessly to all other > ESPs.
the named platform can't handle ED25519 at the moment and it treats signatures it can't handle as failure instead of neutral. Rumor *cough* has it they will stop treating algos the platfom can't handle as failure and treat them to be neutral instead and they are also said to even consider implementing ED25519. I has been rumored also the fix (failure -> neutral) will be rolled out over the next 4 weeks. As of then multi-algo-signing should not be a problem anymore. I can't wait that to actually come true. Issues with ED25519 towards outlook.com have been bugging us for the past 2 years. 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 Aufsichtsratsvorsitzender: Florian Kirstein _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
