Procedure

1. Go to the Content Scanning screen by navigating to Spam Prevention → Content Scanning.
2. Click the Target tab.
3. Select a detection level:
   • High: This is the most rigorous level of spam detection. ScanMail monitors all email messages for suspicious files or text, but there is greater chance of false positives. False positives are those email messages that ScanMail filters as spam when they are actually legitimate email messages.
   • Medium: ScanMail monitors at a high level of spam detection with a moderate chance of filtering false positives.
   • Low: This is the default setting. This is most lenient level of spam detection. ScanMail will only filter the most obvious and common spam messages, but there is a very low chance that it will filter false positives.
4. Select Detect new spam sources to scan email messages containing URLs that may be new spam sources.

   Important You must enable Web Reputation Services to detect new spam sources. For details, see Enabling Web Reputation.

   For details about new spam sources, see New Spam Sources.
   • Identify your company's Organizational MX records and add the MX records to the list.
   • Identify your company's Organizational mail gateway IP addresses and add the IP addresses to the list.
5. Add IP addresses from which the email messages will not be treated as spam to the list of Approved IP Addresses.
6. Add email addresses or domain names to the list of Approved Senders and Blocked Senders.
7. Click Save.