This is nice but doesn’t help me. People often use all the addresses they have for a contact, assuming that some no longer work. I then receive the same message in more than one inbox. When showing the master inbox, Apple Mail seems to hide duplicates by ID. But if I Select All and hit the capture key, EagleFiler goes into the individual inboxes, and the new skipping has no effect.
I don’t mind the duplicates so much, but this means the counts differ between Mail and EF, and I use those to confirm if the import worked.