[Users] Adding a header to incoming/outgoing mail

[Liz]

On Fri, 22 Jan 2021 11:43:29 +0300
Ivan Krylov <krylov.r00t at gmail.com> wrote:

> Alternatively, is there a way to add a Reply-To: header to incoming
> messages matching certain criteria when using IMAP? It seems to me
> that filters aren't allowed to change the contents of the messages.

One way is to filter these messages into their own folder, and on that
folder set the Reply-To property, with you and person B on that line.

Liz