This Integer32 object controls what response code the SMTP proxy sends back when it detects an unauthorized mail-relay attempt, choosing between 550 to explicitly reject and notify the sender, or 250 to acknowledge acceptance while dropping the message at the firewall. An administrator might choose 550 to clearly inform legitimate misconfigured senders of the problem, while choosing 250 to avoid confirming to a spammer that relaying was attempted. For example, setting csOrionFwSmtpRelayReply to 550 would send a clear rejection back to any server attempting to relay unauthorized mail through the firewall.