Configuring image spam options
The Image spam section of antispam profiles lets you configure the FortiMail unit to analyze the contents of GIF, JPG, and PNG graphics to determine if the email is spam. If the email message contains a spam image, the FortiMail unit treats the email as spam and performs the associated action.
Image spam scanning may be useful when, for example, the message body of an email contains graphics but no text, and text-based antispam scans are therefore unable to determine whether or not an email is spam.
To configure image scan options
1. When configuring an antispam profile, enable Image spam in the AntiSpam Profile dialog.
2. From Action, select the action profile that you want the FortiMail unit to use if the banned word scan finds spam email.
3. Enable Aggressive scan to inspect image file attachments in addition to embedded graphics.
Enabling this option increases workload when scanning email messages that contain image file attachments. If you do not require this feature, disable this option to improve performance.
This
Aggressive scan option applies only if you enable PDF scanning. For more information, see
“Configuring scan conditions”.
4. Continue to the next section, or click Create or OK to save the antispam profile.