Mail ActOn 4.0.2 – Map customized email rules and actions to Act-On keys.

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 4.0.2:

OS Support
  • Compatibility for macOS 10.12.2
  • Adds preference to attach Menu Window to viewer; turn off to position MAO menu window arbitrarily
  • Displays result window for rules activated by control key even if no messages affected
  • Performance issue when applying rules that select next message from MAO menu
  • Issues related to animation of menu window
  • Display of keyword/project menus if MailTags is not installed
  • Addresses hang when sending messages
  • Menu window size not being remembered
  • Logic problem when evaluating compound criteria for rules
  • Selected Preferred mailbox not added to recent mailbox list
  • Open smart mailboxes not working
  • Display of mailbox icons
  • Removes add button from recent and smart mailbox headers
  • Crash related to MailTags keywords when processing outbox rules
  • Problems scrolling template editor
  • Next message not being displayed after applying action on OS X 10
  • 11
  • Quick Reply With Template not working
  • Problems applying rules from Mail Perspectives preview window
  • Incorrect continued application of outbox rules after terminal action (eg move or delete) has been applied to message
  • Memory leak related to opening an closing viewers and single message viewers


OS X 10.11.6 or later, 64-bit processor


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