The mailredirect extension for Mozilla Thunderbird (version 0.7 and above) and Mozilla Mail client adds ability to redirect one or more mails to one or more recipients.
Feature of mail redirecting is also known as bouncing.
Who wants this extension?
In office environment there is sometimes a need to forward email with original headers to somebody else. If forward or edit as new command is used, headers are very different comparing to original message (other From, Message-Id, Date fields). If you use Mailredirect Extension headers are not changed, so recipient of redirected mail has almost original message. In practice all important headers in redirected message are identical to original one (From, CC, Message-Id, Date).
This extension is very usefull to send emails unmodified to an spam filter, so it can learn.