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ignatius345

macrumors 604
Aug 20, 2015
7,634
13,074
The option is to delete 50 at a time.
Need more info. I'm guessing the "50 at a time" comes from Gmail because its default view gives you 50 at a time. If it is Gmail, there's a "select all XXX conversations..." link that comes up once you've selected everything in that view.

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