I run an email forwarding app and recently one of our outgoing mail servers are blocked by proofpoint, which is used by icloud.com or me.com. We still have another IP and I routed icloud email to that server but our icloud email volume are very low and I think their flagging is a false positive.I attempted to delist use their office form on https://ipcheck.proofpoint.com
but no response so far
Anyone know how to reach their team who have visibility to this process?
Much appreciate.