Re: Adding a Cntent-Language header

On Thu, Nov 27, 2025 at 02:36:30PM +0100, Sébastien Hinderer wrote:

>Is there a way to add a "Content-Language" header to outgoing e-mails?
>As I understand it, the question is not completely trivial because such
>headers should be added for each MIME attachment and not in the
>message's main headers.

I don't see anything built in. However, editing a message with 
headers[1] lets you type the header and its value(s) yourself, and puts 
that header in the message -- for the simple case, a message with just 
one body part (text/plain), where all headers are in the main header section.

Mutt can compose a message as multipart/alternative: text/plain and 
text/HTML. (You compose Markdown -- plain text -- and then Mutt 
generates the HTML version.) I doubt you can get Content-Language: into 
both alternatives in that case.


[1] $edit_headers=yes, or 'E' in compose menu