You can download ReplyWithHeader 6.1 for Mac from our software library for free. The program is included in Communication Tools. Our built-in antivirus checked this Mac download and rated it as virus free. The current installer available for download occupies 545 KB on disk. This free Mac app is a product of Jeevanandam M.
From the developer:
ReplyWithHeader [aka RWH] is an Apple Mail bundle/plugin that enables quoting of message header and automatic selection of signature while reply or fowward an email. RWH brings Outlook mail header capabilities into Apple Mail.app. Adds missing functionality of headers and signature into Mail.app.
You may want to check out more software for Mac, such as Mail-Grab, PageSender or HeavyMail, which might be related to ReplyWithHeader.