How can "Imported 0 mail messages" happen?

When importing messages from Apple Mail I got on the following notification:

DTK import 0 messages_Screen Shot 2018-12-15 at 21.01.15.png

How can this happen?

If you import a mail message to a group, and then import the same message again, DEVONthink recognizes that the second import would be a duplicate and does not import it.

These sort of things are easy to test for yourself – try it :slight_smile:

Makes sense. Thank you.