This is my preferred method for sending ASCII messages that are longer
than a couple of lines.
The GNU emacs editor has a built-in mail feature that is activated by
typing Ctrl-x m from any window. This command opens a buffer
called *mail*. At the top of this buffer you may fill in the
address and subject. Below the line -text follows this
line- you prepare your message using the full editing features of
the text editor. For example, you may insert a file into this buffer
using the emacs command Ctrl-x i <filename>. To create a
Cc: line, type Ctrl-cfc. When you are ready to send the
message, type Ctrl-c Ctrl-s. Use Ctrl-x b <Enter>
to return to your previous emacs buffer when you are done.