'>' character added. This reversible escaping is termed
"mboxrd" format and described in detail here:
- http://homepage.ntlworld.com/jonathan.deboynepollard/FGA/mail-mbox-formats.html
+ http://homepage.ntlworld.com/jonathan.deboynepollard/FGA/mail-mbox-formats.html
**raw** (default if --part is given)
Write the raw bytes of the given MIME part of a message to