mutt : how do I send multipart/alternative ?

[Frank Gevaerts <frank@gevaerts.be>]

Hi,

I'd like to send MIME multipart/alternative mails with mutt. The only
things I find about mutt and multipart/alternative are about how to 
display such mails. Is there any documentation on this available
somewhere ?

(For those who are wondering : I do not intend to send html mail, but I
want to reply to html mail with a multipart tex/postscript mail)

Frank