> However, is seems the problem is over on the secondary MX (Postfix) > which only has a list of legit relay domains for pMX. When pMX is back > online sMX fwds it's queue, but at that point pMX rejects to sMX...who > then rejects to Sender. I'm not sure how I can get away from that > happening. what is the purpose of having a secondary mx? randy