The easiest way is via command line. The following is one line:

 /var/qmail/bin/qmail-inject This e-mail address is being protected from spambots. You need JavaScript enabled to view it This e-mail address is being protected from spam bots, you need JavaScript enabled to view it <  /var/spool/qmailscan/quarantine/new/mail1101806345562014465

Change the This e-mail address is being protected from spambots. You need JavaScript enabled to view it This e-mail address is being protected from spam bots, you need JavaScript enabled to view it to the right email account and change the quarantine-message to the right filename.

Spacial thanks to Andreas H