Thanks for your fast reply Sandra. On So, Feb 25 2024 11:28, Sandra Snan wrote > Huh, there is a bug here, apparently, looking at the raw version > of what I sent. It doesn't properly insert the RFC 2646 > line-ending spaces. In fact, it does not work for me either. I commented my lines of code and used your code snippet below. Hence auto-fill-mode was kept on while testing it on my side. >>> Instead, do this: >>> >>> (add-hook 'message-mode-hook >>> (lambda () >>> (use-hard-newlines 3 t))) Maybe there are some settings interfering with the right placement/insertion of RFC2646. Any thoughts on this? -- Jan Detke