I recently noticed that Mail on my Mac would automatically remove flags from my messages.

I had set up a rule to flag every incoming message so that I do not forget to reply to a message even if it is marked as read.

However, recently Mail started removing the flag from a message if I view it for a few seconds. I also once saw that all flags were gone without me having viewed the messages at all.

Is this a known problem? Any ideas how to prevent Mail from unflagging messages automatically?

  • When I was on Mavericks I wasn't seeing this behavior. What kind of account are you checking (IMAP, POP, Gmail, Exchange?) Can you think of anything you changed before this started happening? Which version of Mavericks are you running? – dwightk Nov 11 '14 at 14:57
  • I'd be tempted to switch off all rules first, to eliminate those as a possibility. – Tetsujin Nov 11 '14 at 15:41
  • I'm using 10.9.5 with an IMAP account (Google Apps). I didn't touch the setup in months, I only recently noticed this behavior. – Mark Nov 11 '14 at 15:57

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