Traditionally, emails are forwarded by including them in a new message. This has some advantages, but it blurs the line between the new message and the forwarded message somewhat, and replying to the original message can become cumbersome.
Forward Email as Inline Messages and Not Attachments in Thunderbird (2 Solutions!!)
Forwarding messages as attachments solves these problems elegantly. In Mozilla Thunderbird, Netscape and Mozilla forwarding as MIME attachments is easy.
To forward an entire email message as an attachment in Mozilla Thunderbird:
To add more messages to forward and send a new message or reply immediately:
