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Remove Duplicate Messages removes duplicate messages from the current selection in Apple Mail. The script determines whether a message is a duplicate of another message by examining these message headers:

  • MessageID
  • Subject
  • From
  • Date

If these message headers match another message in the view, the script flags the message as a duplicate and removes it from Mail.

The script displays interactive dialog boxes that allow you to specify whether you want duplicate messages to be removed or retained, optionally prompting you for each duplicate message it encounters

What's New in Remove Duplicate Messages

Version 1.3.6:
  • Refactored duplicate message search algorithm logic for improved accuracy and efficiency.
  • Fixed a bug where removed messages might not get archived if their hash signature matches a message that was previously archived.
  • The script now compares the total size of all attachments in each encountered potential duplicate message. Duplicate messages with a greater total

Requirements for Remove Duplicate Messages

  • OS X 10.6.8 or later
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Remove Duplicate Messages User Discussion

3.7 7
Current Version (1.x)
Downloads 6,166
Version Downloads 2,187
License Free
Date 04 Jul 2017
Platform Intel 64 / OS X / Intel 32
Price Free
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