#### 3.5.4.5 Enclosing Another Message: ~m and ~M ¶

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.

In both cases, the contents of `indentprefix` mail variable is prepended to each line enclosed.