Hi @StephenBrown
You would need to define which email app you are trying to use. (e.g. Gmail, Outlook, etc.)
If you are trying to run Zaps on a schedule, then check out the Schedule Zap app: https://zapier.com/apps/schedule/help
If you are trying to find multiple matching rows in an Excel file, then you may be limited by the available Excel Zap app actions: https://zapier.com/apps/excel/integrations#triggers-and-actions
You may want to consider using GSheets in stead of Excel, which supports finding multiple rows.
https://zapier.com/apps/google-sheets/integrations#triggers-and-actions
If you are trying to iterate thru 1+ rows of data, then the Looping app can be used: https://zapier.com/apps/looping/help
An alternative approach would be to use Airtable: https://zapier.com/apps/airtable/integrations#triggers-and-actions
Airtable has native Automations with native integrations for Outlook & Gmail.