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Mail Act-On is the powerful enhancement to Apple's Mail Application that puts organization at your fingertips. Use Mail Act-On to create rules to perform action on messages by responding to simple keystrokes. Create Outbox rules to automatically add headers and set the archive mailboxes of sent mail. Mail Act-On is the indispensable tool for anyone who needs to manage their mail more efficiently.

What's New

Version 4.0.4:
  • Fixes localization and interface issue for set signature and append message body
  • Issue with recent mailbox not having account name listed
  • Crash when evaluating content criterion for outgoing messages
  • Issue opening a single message viewer when message present
  • Memory leak related to keystrokes
  • Crash when closing composer


  • OS X 10.11.6 or later

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Mail ActOn User Discussion

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4.1 35


Current Version (4.x)


Downloads 27,947
Version Downloads 203
License Shareware
Date 13 Jun 2017
Platform Intel 64 / OS X
Price $30.00
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