that would be analagous to mutt's "edit_headers" setting which I use and enjoy. I still find the :????-field keybindings clunky.
Thanks. I have failed to try this as sourcehut's mailbox download has format=flowed which broke git-am and the raw download is un-decoded quoted-printable which breaks patch(1), then I ran out of time. But I look forward to shaving those yaks and getting to give this a try.
I definitely hate those ;)
Instead of that, I'd rather see the capability to add arbitrary header to outgoing emails (maybe via the templates?)
That would be very useful for other reasons (and would address this feature request)
I'd rather not have that on by default... I hate it if tools do that.
I was under the impression that most, if not all, MUAs set it. But I could be wrong. (and that doesn't change your objection to it of course, which is fine, I understand that)
It will help me recall which UA I used when sending mail via aerc; it also "promotes" aerc a little bit by getting evidence of its existence out there; it could also be useful for diagnosing bugs (esp. if a version was included in the string). Example from another MUA:
This further suggests that yes, they are just using the Apple Notes-in-IMAP encoding convention https://fastmail.blog/2015/12/24/note-to-self-imap-notes-are-go/
If you mean this → https://www.fastmail.com/help/clients/macmail-manual.html
Then this is just a convention for encoding Mac OS X or iOS notes into IMAP folders. I use this myself, and I can read my Notes in aerc fine, they're just normal mails inside the "Notes" folder.