MailTags

MailTags is an extension for Mac Mail. With MailTags, you can tag your emails with key words, notes and appointments. MailTags works with iCal and Spotlight - This allows you to find emails quickly and provide them for example with tasks from iCal.
All functions of MailTags are applicable to both incoming and outgoing emails.

Note:
Since version 2.0 MailTags is no longer freeware. Therefore, we offer only the version 1.2.2 for download. The latest version can be accessed via the website link.