Required fields added in POST /simulations/inbound_mail_items (inbound_mail_item)

What changed

Required fields added in POST /simulations/inbound_mail_items (inbound_mail_item) Affected surface: POST /simulations/inbound_mail_items. Root cause: schema `inbound_mail_item`. Detected at Tue, 28 Apr 2026 23:52:23 UTC UTC.

Diff

{
  "added_required": [
    "lockbox_recipient_id",
    "lockbox_address_id"
  ],
  "path": "POST /simulations/inbound_mail_items",
  "schema_path": "schema inbound_mail_item"
}

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

Add the new required field to all request payloads or arguments. Requests omitting it will be rejected.