mbsync: file-error "not a regular file"

Question

I'm using notmuch-mode from within Emacs to send email using isync/mbsync through Gmail. However, every time I send email from within Emacs, I get this error:

Debugger entered--Lisp error: (file-error "not a regular file" "/Users/peter/Dropbox/mail/gmail/sent") insert-file-contents("/Users/peter/Dropbox/mail/gmail/sent" nil 0 100) mail-file-babyl-p("/Users/peter/Dropbox/mail/gmail/sent") message-output("/Users/peter/Dropbox/mail/gmail/sent") message-do-fcc() message-send() send-message-without-bullets() call-interactively(send-message-without-bullets nil nil) command-execute(send-message-without-bullets)

Does anyone know how to fix this?

I can share relevant details from my .mbsyncrc if that would be helpful.

Answer 1

As answered on the notmuch mailing list, you need to use notmuch-mua-send rather than calling message-send directly.