The Mailredirect extension for Mozilla Thunderbird and SeaMonkey adds the ability to redirect one or more email messages to one or more recipients.

The feature of email redirecting is also known as remailing or resending.
This extension is an answer for bug #12916.

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 the Mailredirect Extension headers are not changed, so the recipient of redirected mail has almost the original message. In practice all important headers in redirected message are identical to original one (From, CC, Message-Id, Date).

People who are "sorting" incoming email messages to their company are the first users who would like to use the Mailredirect Extension.
I think every experienced email user will appreciate the Mailredirect Extension.