Forwarding (FWD) all mail to a specific mailbox (highrise setting)?

Question

Email

It is necessary to set up the forwarding of all mail from several mailboxes to one specific one, as here:

I.e. it is necessary that the subject become FWD, and the body of the letter should be From: <sender>. All this must be done remotely, i.e. option, setting up a desktop mail client for forwarding is not suitable.
How would you most cost effectively solve this problem?
PS The ultimate goal is to set up highrise .

Answer 1

The first recipient-server is engaged in forwarding. If nix, procmail is used, which does everything with the letter. In general, everything. You can use a script in any language that accepts a letter on stdin.
In general, you need to dig the demon that processes mail.