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Hey @bryce,

You’d use webhoooks for this.

I forget if Loops has a webhook for unsubscribes — I just asked them and will let you know what they say.

EDIT: Looks like Loops doesn’t support that now but plans to

But for other services like Postmark, there’s a webhook that you can trigger which passes an important response that will let you know the email unsubscribed.

The webhook in Postmark will point to a public backend workflow which would handle that