We manually updated to WHM 11.32.5 (build 11) on our Centos servers this weekend and now when we look we see thousands of emails sitting in the queue as rejected. This a gigantic jump in rejections, on one server which usually has less than a hundred there are over 6,000. Almost all of the rejected emails say : ---------- A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: email@example.com The mail server detected your message as spam and has prevented delivery (10). ----------- Of course the rejected address does exist and we have not changed any rules as far as I know. This is affecting ALL servers that were upgraded over the weekend.