On gmail for mac can * be used as a wildcard in filters

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For example, searching for subject:(how geek) would only return messages with the words “how” and “geek” in their subject field. To put together more complicated searches, you’ll need to know the basics. By default, Gmail’s search ignores messages in the spam and trash.

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to: – Search for messages sent to a specific address.Useful search operators you can access from the basic dialog include: