delivered * | boolean | `true` when the receiver responded with a `2xx` status within the timeout. `false` when URL SSRF re-validation fails, DNS doesn't resolve, the receiver times out, or it answers with a non-`2xx` status code. |
http_status * | integer | HTTP status code the receiver answered with. `0` when no HTTP response was received (DNS, timeout, SSRF re-validation failure before the connection). |
response_time_ms * | integer | Total elapsed time between the start of the delivery attempt and the response (or timeout) in milliseconds. Includes DNS + TLS + roundtrip. |
error | string | null | Failure detail when `delivered=false`. `null` when the delivery succeeded. |