Daylite Mail Assistant Could Not Look Up the Selected Message

In certain circumstances, such as when an email fails to load, the Daylite Mail Assistant crashes or some data is not sent to the Daylite Mail Assistant correctly, you will see the following message indicating that the Daylite Mail Assistant could not look up the selected message. Follow the steps below to resolve this message and reduce its frequency.


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If you are on macOS Ventura and experiencing this issue, follow the steps outlined in Reverting to the Legacy Mail Assistant Plugin from the new Mail Assistant Extension


If you are already on macOS Sonoma, please have the latest version of Daylite installed by running the latest version of Daylite and macOS 14.3.1 or greater, as these include important updates which improve the stability of the Daylite Mail Assistant. Additionally, ensure that you have Daylite installed correctly, including not having multiple copies installed on your Mac.


If you continue to experience this issue, follow the steps below:


  1. Quit both Daylite and Mail.
  2. Launch Daylite.
  3. Launch Mail and select the email again.

If the issue persists, restart Daylite Mail Assistant by turning it off in System Settings, then restart your Mac. You can do that by following the steps below:


  1. Quit Mail
  2. Click  in the top left corner of your display and select System Settings...
  3. Select Privacy & Security > Extensions > Added Extensions and turn off com.apple.email.extension in the section for Daylite
  4. Restart your Mac
  5. Open Mail, turn on the extension by going to Settings >  and check again

If the issue persists after restarting the Daylite Mail Assistant, please contact customer support for further assistance. 


How come some messages work when others don't?

When the extension fetches email data for a viewed message, it stores it in a separate database for the helper to read. If the Mail Assistant extension crashes and subsequently a previously unseen email message is selected in Mail, its data will not get captured, resulting in this error.

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