>>Why do you remove ARC signatures ? Because they have no relevance when you have rewritten both MAIL FROM, RCPT TO, and MIME From, and MIME To. If the mail is forwarded again, then both second forwarding server and final server will test against YOUR server, so it's the second forwarding server that in that case should add ARC signatures.
But forwarding in 2 step is uncommon and useless, better to aim both forwarding addresses to the same final address. >>That might help the message reach the mailbox, but the recipient will >>have to look harder to see who the message claims to have been >>originally sent by. Agreed with that. The info is in "Reply-To" instead. It's a tricky thing, because writing From: "original_sen...@server.com" <forwarded_u...@yourserver.com> may trip anti-phishing / anti-spam systems. If you absolutely must preserve sender information, encapsulate the mail in a new message/rfc822 object instead... So a mail that looks like this (if forwarded_user is a forward to exam...@gmail.com): From: original_sen...@server.com To: forwarded_u...@yourserver.com Subject: Hey Content-Type: text/plain Is sent as: From: forwarded_u...@yourserver.com To: exam...@gmail.com Subject: Fwd: Hey Content-Type: message/rfc822; boundary=1234 Encapsulated email follows --1234 From: original_sen...@server.com To: forwarded_u...@yourserver.com Subject: Hey Content-Type: text/plain --1234-- >>Note. This example is confusing Oooh sorry about that. I tried to be clear with youru...@server.com being the sender, forwarded_u...@example.com being the address with a forward configured, and somewh...@gmail.com being the forward target. Replaced youru...@server.com as original_sen...@server.com instead. -- ## subscription configuration (requires account): ## https://lists.exim.org/mailman3/postorius/lists/exim-users.lists.exim.org/ ## unsubscribe (doesn't require an account): ## exim-users-unsubscr...@lists.exim.org ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/