[Users] Adding a header to incoming/outgoing mail

[Ivan Krylov]

Dear all,

I was asked to always Cc: "person B" when messaging person A. Person A
always uses "Reply to sender", so their replies to me never contain Cc:
"person B" or anything like that, even if I manually add Cc: "person
B" in my own messages. Can Claws-Mail help me add Cc: "person B"
automatically? I can write a plugin if I have to.

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.

-- 
Best regards,
Ivan