ePrism User Guide - EdgeWave

Anti-Spam Features
Note: During the upload of a neutral words list, the system will automatically rebuild the
STA database. This process may take some time to complete.
STA and Languages
The STA spam database is based on English language spam. As a result, it may not be initially
responsive to spam created in other languages. STA’s ability to learn means that it can readily adapt
to other languages. Ensure that DCC is enabled because all mail identified as "bulk" by DCC will
be used by STA to train as spam. Assuming that some of these messages are in the local language,
STA will build a database that reflects that language. STA will train on local legitimate mail from
the moment the system is started. This will help properly characterize the local language use and
prevent it from being classified as spam.
It is recommended that you use the "spam" action in Pattern Based Message Filters (PBMF), and
select "Train as STA Spam" in the PBMF Preferences. Messages specified as "spam" will be
forwarded to STA and will increase its database of local language words.
• Japanese Language — STA can process Japanese language messages to ensure they are not
automatically classified as spam.
Default — All Japanese content is processed by STA. If you receive legitimate Japanese mail,
this may result in false positives.
No STA Scan — STA scanning will be turned off for all messages containing Japanese
characters.
Lenient STA Scan — STA scanning will be turned off for only the parts of the message
containing Japanese characters. The rest of the message will be processed normally. If there are
20 or fewer non-Japanese tokens in the message, the STA scan will be skipped for that message.
Diagnostics
• Enable X-STA Headers — This setting inserts X-STA headers into all messages. These are not
visible to the user (although they can be filtered in most mail clients), but can be used to gather
information on why mail is processed in a particular way.
The following headers will be inserted:
X-STA-Metric — The "score" assigned by STA, such as 95, which would indicate a spam
message.
X-STA-NotSpam — Indicates the words with the highest non-spam value found in the
message.
X-STA-Spam — Indicates the words with the highest spam value found in the message.
• Enable Monitoring — Select the check box to enable the monitoring of messages received by
the specified email address.
• Monitor email for — Enter an email address that you would like to monitor.
• Copy to — Copy messages and the STA diagnostic to this email address.
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