whiteout-io/mail-html5 — pull request #65 by andris9 (2014-05-21 12:21:51+00:00)
Title: [WO-399] Handle reply-to, in-reply-to and references headers

* Use address from the `reply-to` header for replying
* Use and update `references` header when replying or forwarding
* Set `in-reply-to` header when replying