Postbox 6.0.8

Postbox will enable you to easily manage multiple mail accounts from the same interface. Postbox helps you make the most of your email, offering powerful new ways to find, use, and view email messages and content, organize your work life, and get stuff done.
Postbox works behind the scenes to catalog everything in your email. We mean everything: every bit of text, every contact, address and link. Every picture, document and attachment. It’s all in the catalog and it’s all searchable. Just click the Images tab to see a thumbnail gallery of every picture.

Requires Intel Mac OS X 10.11 or later