Situation: you need to bounce some messages from one user to another or to a mailing list.
Criteria: the sender should be real and without changes on the message
aptitude install mutt
…if not installed.
Open your Maildir with mutt:
mutt -f /home/info/Maildir/
Tag messages with: t
Bounce tagged messages with: ;b
Now enter a address of recipient and accept the bounce process with yes