How to Remove email id from a customer site in bulk

Summary:

We have a requirement to remove email Id from customers site level, customer count is around 1200 so is there any way we can mass remove the email id in FBDI? need help with such template.

as we need to bulk update the needed customer site is there way to update specific customers?

We have details of Customer a/c and site from which email needs to be removed.

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