mh-mml-secure-message-sign
mh-mml-secure-message-sign is an interactive autoloaded compiled Lisp function in `mh-mime.el
'.
(mh-mml-secure-message-sign METHOD)
Add tag to sign the message.
A proper multipart message is created for you when you send the
message. Use the command M-x mh-mml-unsecure-message to remove
this tag. Use a prefix argument METHOD to be prompted for one of
the possible security methods (see `mh-mml-method-default').