Information Protection and Security

An open mail relay allows email to be passed through it and is often abused for the sending of spam. It tends to be a configuration issue. Review these recommendations when a host has been identified as a possible open mail relay.

• Secure the host against open mail relay (also known as third party relay).  See Application Note: How to secure your mail system against third-party relay.
• Test the host. This is best accomplished outside of RUNet, since some hosts choose to permit mail relay from other rutgers.edu sites. Caution: Request written authorization for the testing from your management prior to launching any tests. Sites that offer testing services include Mail Relay Testing from the Network Abuse Clearing House. 
• Check the various blacklists for your host IP address. If they are listed, follow the site instructions for removal of the hosts.