Enable the virus scanner to scan incoming emails for malicious files before they reach your inbox. If a virus is detected, the corresponding mails are marked with the word ***INFECTED*** in the subject line.
Activate the spam filter to scan incoming mails for spam identifiers before they reach the inbox. Corresponding mails are marked with the word ***SPAM*** in the subject line.
The spam-score field allows you to adjust the sensitivity of the spam filter. The lower the number, the more sensitive the spam filter is.