Comment by frollogaston
7 hours ago
Same, I remember it being in the headers long ago but don't see it now. macOS Tahoe, Mail.app client, iCloud email sending to itself or to my Gmail, both set up in default ways, IPv6 disabled
7 hours ago
Same, I remember it being in the headers long ago but don't see it now. macOS Tahoe, Mail.app client, iCloud email sending to itself or to my Gmail, both set up in default ways, IPv6 disabled
From what I see above, it looks like the trick is to send from Mail.app to an account read by a different app (maybe just Gmail?).
I would need to test with my hosting Webmail client, so maybe tomorrow.