10.7: Adjust Mail's delay for marking items read in conversation view

Feb 15, '12 07:30:00AM

Contributed by: jlukas

By default, Mail will mark a message in a conversation read after a short delay. To adjust the short delay (for example, to remove it), use the following command (replacing 0 with the desired time in seconds):

defaults write com.apple.Mail MarkAsReadDelay 0

To revert to the default:

defaults delete com.apple.Mail MarkAsReadDelay

As far as I can tell, there isn't a way to affect the delay for single messages.

[crarko adds: Nice.]

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