I use a virtual alias to create a simple distribution list to make communication easier within our group. I'd like to add a "Reply-To" header to e-mails being forwarded through the virtual alias, because I'd like to direct replies back to the list by default.
How can I configure Postfix to add a "Reply-To" header? I only want to add a Reply-To to e-mails sent to a specific virtual address. I would not like to use a dedicated mailing list software.