I here announce the release of Subjectivity 1.0. Subjectivity is a Mail.app plugin that helps prevent against accidentally sending e-mail messages from Mail.app that lack a subject line. It is pretty simple, but hopefully quite valuable.

This first version is written in PyObjC, following the guidance provided by the author of the of the Mail Attachment Scanner. It works well, but hopefully a future version implemented in Objective-C will reduce file size and add support for Mac OS X’s summarization services.

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Download Subjectivity v1.0 (Universal):

Subjectivity.dmg.