Enabling and disabling SPF message authentication

To enable or disable SPF Mail Sender Authentication:

1. In the main window of the program web interface, open the management console tree and select the Settings section and Protection subsection.
2. In the External Services section, click the Enable SPF Mail Sender Authentication link to open the External Services window.
3. In the list to the right of the Enable SPF Mail Sender Authentication setting name, select one of the following options:
   • Yes, if you want to enable SPF Mail Sender Authentication.
   • No, if you want to disable SPF Mail Sender Authentication.
4. Click the Apply button.

To enable SPF message authentication, you have to allow Kaspersky Security 8 for Linux Mail Server to connect to the DNS server. If the connection to the DNS server is prohibited, SPF Mail Sender Authentication is disabled.