Node:Enclosing Another Message, Next:Adding a File to the Message, Previous:Modifying the Headers, Up:Composing Mail
If you are sending mail from within mail command mode, you can enclose
the contents of any message sent to you by using ~m or ~M
commands. Typing ~m alone will enclose the contents of the
current message, typing ~m 12 will enclose the contents of
message #12 and so on.
The ~m uses retained and ignored lists when enclosing headers,
the ~M encloses all header fields
(see Controlling Header Display).
In both cases, the contents of indentprefix mail variable is
prepended to each line enclosed.