This section provides descriptions of the lists that ship with PureMessage. It describes their use in the PureMessage policy, and it describes the Match type that is set for the list, which determines the form in which you can set non-specific entries. For more information, see "Match Types".
PureMessage ships with the following default lists:
Quarantine Digest Users: This list is used to identify users who will receive Quarantine Digests. Only users with messages in the quarantine receive digests. Match type: Email Globs.
Trusted Relay IPs: Trusted relays are mail-filtering hosts that are known to be safe. PureMessage uses a Trusted Relay IPs list to differentiate between unknown relays and "internal" relays (or trusted external relays). Relays with IP addresses within the 127.*.*.*, 192.168.*.* and 10.*.*.* blocks are always treated as internal relays. By default, the IP address of the first "external" relay is tested against the RELAY_IN_* group of anti-spam rules. All other external relays are tested against the RCVD_IN_* group of anti-spam rules.
All IP addresses of relays that are known to be safe, but are not included in the IP address blocks described above, should be added to the Trusted Relay IPs list. For example, if an ISP provides message-relay services for your organization, the IP address of the ISP's mail server should be included in the Trusted Relay IPs list.
Once the Trusted Relay IPs list is populated, configure the Disable non-relay checks? option on the Policy: Anti-Spam Options page.