Delete & Replace Mac Mail app
I was having issues using AOL mail on my iPad Pro & your Tech support helped greatly. But after all was done I went to my iPad & discovered the mail I was using was from AOL, not the app. I wasn't able to sign in to my AOL app on the iPad so my wife suggest I delete the app & reinstall since I had made changes to AOL on-line & not through the app. I did & all is well. Just wanted to add that to your list of possible solutions.
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David Nemecek
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