When I forward an email, there's a huge header that I can't remove. It annoys most of my recipients, many don't see what I've written and don't reply, some think I've got a virus and delete the email. I'm talking about all the lines as below: X-Account-Key: X-UIDL: X-Mozilla-Status: X-Mozilla-Status2: X-Mozilla-Keys: Delivered-To: Received: X-Received: Return-Path: Received: Received-SPF: Authentication-Results: DKIM-Signature: X-Thread-Info: Received: Received: Content-Type: MIME-Version: Message-ID: I'd also like Thunderbird to stop displaying these fields on emails I receive.