The anti-spam system adds a [SPAM] tag at the beginning of the subject line of messages which have caught the attention of the anti-spam software.
Spam-tag headers include the following:
- X-SpamTest-Categories: This includes additional categories that may apply to the spam. These should be considered informational only.
- X-SpamTest-Info: Several of these headers are added with details about the spam processing steps, anti-spam database versions and so forth.
- X-SpamTest-Method: One or more of these headers is added with summary details about the reasons for the spam classification
- X-SpamTest-Status: This header is always added when the message passes through the anti-spam system. This header should be the one used for automatic filtering at the clients. Possible values for the header include:
- X-SpamTest-Status: SPAM
- X-SpamTest-Status: Probable Spam
- X-SpamTest-Status: Not Detected
- X-SpamTest-Status: UWA probable
- X-SpamTest-Status: UWA matched
The final two replace probable spam and spam tags respectively and are applied when the email has never been outside the campus.
Anti-spam system notes and architecture
The anti-spam software is implemented on the central anti-virus scanning machine. Any email to a department that travels between UWA routed subnets and is subject to the SMTP policy routing will be scanned.