Saturday Geek – Email address books – Duplicate Records
Duplicates in your address book.
Joe Smith or Mary Jones have more than one email address.
They sent an email from another one or have an old email they no longer use still in your contact list.
Go into “Contacts” – select all & check for an option that says “Find or Merge Duplicates”.
That will do the search for you.
When I did mine it showed 47 duplicate records & combined them all into one.