Yeah, my last email got delivered as they replied back. I'll check the status for each email to see if I can spot any difference. If not, I'm positive it's on their end and that's all that I care about. I tried troubleshooting things with the client and I get vague responses back like they're a freaking politician and I'm an investigative reporter trying to expose them
"delivery-status": {
"attempt-no": 1,
"certificate-verified": true,
"code": 250,
"first-delivery-attempt-seconds": 3.223,
"message": "ok dirdel",
"mx-host": "mta7.am0.yahoodns.net",
"mx-host-ip": "67.195.228.110",
"session-seconds": 1.087,
"tls": true
"event": "delivered",