MailFollowUp (Mail Plugin for Mac OS X)

Adds "Follow Up" items to the Message and contextual menus (and optionally a toolbar button) of Apple's Mail application that allows you to compose (and then send) a quoted version of the original message to all of the original recipients, keeping the To, Cc and Bcc addresses exactly as they appeared in the original message. Specifically, in keeping with Mail's built-in Reply and Reply All functionality, the plugin adds "Follow Up" (original To: recipients only) and "Follow Up All" (all original recipients) functionality via both menus and toolbar items.

[From MailFollowup Home Page]

升級到 10.6 以後，我有個很常用的 Mail plugin 瞬間不能用了，在作者的努力之下，推出的新版本終於可以在 10.6 下使用了。作者的 homepage 裡面還提到，除了 Follow-up 的 mail title 文字可以自己改以外，還可以改 menu 和工具列裡面的 icon 文字標籤：

defaults write net.welchwold.mailfollowup FollowUpPrefix -string "Follow-up: "
defaults write net.welchwold.mailfollowup FollowUpMenuTitle -string "跟進"
defaults write net.welchwold.mailfollowup FollowUpAllMenuTitle -string "跟進所有人"
defaults write net.welchwold.mailfollowup FollowUpToolbarItemTitle -string "跟進"
defaults write net.welchwold.mailfollowup FollowUpAllToolbarItemTitle -string "跟進所有人"

這樣改完之後，畫面上的整合度看起來就很高了。