Hello. I am setting up smartermail, and I dont think that I have something set up propertly. Email is received by some domains, but not by others. I get a delivery failure bounce message (below) for the domains that dont recieve the email. Could not deliver message to the following recipient(s): Failed Recipient: Reason: Remote host said: 601 Failed all attempts to connect to the recipients mail server. Attempted to send the message to the following ip's: 18.104.22.168 Does anyone have some suggestions for resolving this situation? I dont know a lot about mail, but my gut feeling is that the destination email host is denying delivery for some reason. Thanks in advance.