Moin, 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. Are there similar experiences of reduced deliverability by senders multi-signing, and including ed25519? With best regards, Tobias -- Univ.Prof. Dr.-Ing. Tobias Fiebig T +31 616 80 98 99 M [email protected] _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
