[
    {
        "event": "failed",
        "timestamp": "2026-04-20 14:00:35",
        "recipient": "gul.karababa@cengiz.com.tr",
        "delivery-status": {
            "mx-host": "mail.cengiz.com.tr",
            "retry-seconds": 600,
            "code": 421,
            "session-seconds": 0.843,
            "first-delivery-attempt-seconds": 7.694,
            "attempt-no": 1,
            "enhanced-code": "4.7.5",
            "description": "",
            "message": "4.7.5 <unknown[159.135.231.3]>: Client host rejected: Connection IP is blocked by SMTP Traffic Throttling of IMSVA"
        },
        "sending-ip": "159.135.231.3"
    },
    {
        "event": "accepted",
        "timestamp": "2026-04-20 14:00:27",
        "recipient": "gul.karababa@cengiz.com.tr",
        "delivery-status": null,
        "sending-ip": null
    }
]