I am not sure what you are trying to achieve. But I would almost say you should do something with sendmail routing or so. Then you route messages to any server and any destination email address as you like. Without changing the headers and you may not need to add a reply-to header.
-----Original Message----- From: Stephan Bosch [mailto:[email protected]] Sent: 30 November 2018 10:31 To: [email protected]; [email protected] Subject: Re: Replacing email envelope Op 20/11/2018 om 22:51 schreef [email protected]: Hi, Could you please advice how I can replace envelope of a message received on my server? Best would be using sieve. Simple case - email [email protected] receives message, which I'd like to repack into new envelope (I want to have control what values in the envelope will be there - from, to, replay-to et.c) and send to [email protected]. At first I wanted to use editheader extension, but it is not allowing me to modify From or To values as far as I can tell. Another idea was to use envelope, but I don't see any way of editing values. Only reading. Now, I am thinking of writing script and from sieve it will be passed there, where I'll do message parsing and send new message using mutt or something similar. Frankly speaking I suppose there is much better solution to that and I'd appreciate any advice on the topic. Your story conflates the message envelope with the message header. From your description, I gather you in fact mean the message headers that contain sender and recipient addresses. You should be able to modify those using the editheader extension (first deleteheader then addheader). Regards, Stephan.
