In ConsoleOne, you can configure the Internet Agent to reject messages in certain situations:
Messages are received from known open relay hosts or spam hosts (Internet Agent object >).
Messages are received from any hosts that you specifically do not want to receive messages from (Internet Agent object > Access Control > Default Class of Service > Edit > Allow Incoming Messages, Prevent Incoming Messages, and Exceptions).
Messages are received through an anti-spam service that uses an “X” header field to identify potential spam (Internet Agent object >).
Thirty messages are received within 10 seconds from the same sending host (Internet Agent object >). The number of message and the time interval can be modified to identify whatever you consider to be a potential mailbomb.
Messages are received from SMTP hosts that are not using the AUTH LOGIN host authentication method (/forceinboundauth startup switch).
The sender’s identify cannot be verified (Internet Agent object >).
For detailed setup instructions on these anti-spam security measures, see Section 47.2, Blocking Unwanted E-Mail from the Internet.
Messages that are identified as spam by the Internet Agent are not accepted into your GroupWise system.