Can you apply a new Zap to parse old/existing emails in Gmail - Ie set a date range to limit the parsing?
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Hi
Welcome to the Community! 
At the moment, Zaps are only built to look at new and incoming information, and won't process existing data. You can read a bit more about this here: https://zapier.com/help/create/basics/why-isnt-my-zap-triggering-on-existing-records
This means that data created before the Zap is turned on won't be pulled in automatically.
That said, if you're able to export that data as a spreadsheet or CSV file, you may be able to "import" them using a separate Zap. This guide has some great visual references for getting that workaround set up: https://zapier.com/help/create/basics/bulk-import-data-into-zaps
Hopefully, this helps.
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