XFOR: Setting Accept/Reject by Host in IMC Connection Settings

SUMMARY

The Microsoft Exchange Server Administrator's Guide, pages 332-338, explains how to set up the Connections Property page for the Internet Mail Connector (IMC). However, the documentation on Accepting or Rejecting by Host setting does not state the effect of setting this feature, that is, whether a Non-Delivery Report is sent or connections are simply refused.

If you set the Reject by Host setting, all hosts that fit that masked IP range will get the following error when attempting a connection: If you set the Accept by Host setting for a Masked IP range that falls under an entry for a Reject by Host, the Accept by Host will override and allow a connection.

   First Entry:
   IP Address = 157.57.10.0
   Mask = 255.255.0.0
   Action = Reject connection from this Host
				

   Second Entry:
   IP Address = 157.57.10.0
   Mask = 255.255.255.0
   Action = Accept connection from this Host