In the previous two articles of this Postfix series you learned how to set up and manage the email server database through phpMyAdmin, and how to configure Postfix and Dovecot to handle incoming and outgoing mail. In addition, we explained how to set up a mail client, such as Thunderbird, for the virtual accounts we created previously.
Since no email server setup can be complete without taking precautions against viruses and spam, we are going to cover how to add antispam and antivirus protection using ClamAV and SpamAssassin in this article.