Fix Mac Mail Smart Mailbox Not Working issue

Solution: 1

Step 1: On your Mac, click the Finder icon at the Dock and select Applications from the left-side panel.
Step 2: In the Applications window, click the “Utilities” icon and select Activity Monitor from the “Utilities” folder.
Step 3: In the Activity Monitor window, click the View menu and select All Processes from the drop-down menu.
Step 4: Type “mds” in the search panel and hit the Enter button.
Step 5: From the search result, click the mds or mdserver option and click the X button at the top-left corner of the window.
Step 6: If prompted, click the Force Quit button to remove the mdserver on your Mac.
Step 7: Repeat the same procedure to delete other instances of mds.
Step 8: Now, the index will be cleared, and you can use the Smart Mailbox on your Mac Mail.

Solution: 2

Step 1: If you are running the Apple Mail app, click the Mail menu at the top-left corner of the screen.
Step 2: Select the Quit Mail option from the drop-down menu to close the Mail app.
Step 3: Alternatively, press the Command + Q shortcut keys to close the Mail app.
Step 4: Now, relaunch the Mail app while pressing the Shift button.
Step 5: Close the Mail app again and repeat this procedure twice to perform a hard reset of the Mail app.
Step 6: Next, open the Mail app and check if you could access the Smart mailbox feature.
Step 7: If the problem persists, move on to the next method to troubleshoot the issue.

Solution: 3

Step 1: On your Mac, close the Mail app if it is open.

Step 2: Click the Finder menu and select the Go option from the drop-down menu.

Step 3: Tap and hold the Option key and click the Library icon.

Step 4: Locate and give a double-click on the Preferences folder.

Step 5: Select the “.plist” files from the displayed list and give a right-click on them.

Step 6: Select the Move to Trash option from the pop-up menu.

Step 7: Click the Trash icon near the Dock and empty the trash.

Step 8: Open the Library again and go to Containers, followed by com.apple.mail.

Step 9: Select Data and then click Library.

Step 10: Open Saved Application State and locate the com.cpple.mail.savedState files.

Step 11: Move them to trash and navigate to Library.

Step 12: Select Mail followed by MailData.

Step 13: In the MailData window, select the Envelope Index, Envelope Index-shm, Envelope Index-wal files and move them to the Trash folder.

Step 14: Exit the library window and relaunch the Mail app to check whether you could access the Smart mailbox feature.

Step 15: If the Mac Mail Smart Mailbox Not Working properly Click the Call or Call Us button available on this screen to get remote assistance.

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