Parameter 'lockbox_id' removed from GET /inbound_mail_items

What changed

Parameter 'lockbox_id' removed from GET /inbound_mail_items Affected surface: GET /inbound_mail_items. Root cause: parameter `lockbox_id@query`. Detected at Tue, 28 Apr 2026 23:52:23 UTC UTC.

Diff

{
  "parameter_in": "query",
  "parameter_name": "lockbox_id",
  "path": "GET /inbound_mail_items"
}

Likely impact

Existing integrations relying on this surface will fail or behave incorrectly. Treat this as a release-blocker until the recommended action below is applied.

Recommended action

Remove the parameter from your callers — passing it now produces an error or is silently ignored depending on the provider.