Hey folks, Is there anyone from Apple able / willing to assist with iCloud/Me/Mac.com issue? Messages from a reputable sender are being rejected as "4.1.8 (bad sender's system address)". As far as I can tell, sender is in full compliance (fully aligned DKIM, SPF, DMARC, A record on hostnames to dedicated IPs, MX on sending domain(s). Not sure what else could possibly be needed. I've already contacted iCloud admin team, but it's been over a week since the initial issue (missing hostname A record) was addressed by the sender and the problem persists. Thanks in advance.
Allen KListrak
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