A webhook lead for an address held by an archived record is refused, not retried forever

If an archived customer record in your organisation still holds the email address a lead names, the inbound lead webhook used to answer with a server error. Your CRM would retry it, and every retry failed the same way. The webhook now answers 422 with an error on customer.email: ask an admin to restore or remove the archived record, or send the lead with another address. Nothing is created until then.

The delivery log on Admin → Settings → Integrations labels these deliveries An archived or existing record already holds that address.

A lead for an address that already belongs to a customer in your organisation always attaches to that customer, whichever sign-in account the customer is linked to. No invitation is sent and nothing counts against the invitation limit.