What is SPF and how can to activate it

SPF (Sender Policy Framework) is a way to prevent sender address forgery in emails. SPF will not directly stop spam (junk email). It will give domain owners a way to define which mail sources are legitimate for their domain and which ones are not.

To enable SPF for your domain, go to the Email Options > SPF Protection section of your Web Hosting Control Panel.

Choose the exact domain name you wish to protect and switch the Status to ON from the drop-down menu next to your domain name.

Here are the required settings for each field:

Hosts:Fill in a list of all the hosts, which are authorized to send mail on behalf of the chosen domain name, e.g. mail.my-best-domain.com. Separate the hosts with a space or a comma.

IPv4:Type in the IP address of your SMTP mail server (mail.my-best-domain.com). Please have in mind that most of the mail servers have more than one IP address and in order to determine all of them, you can use an online tool like the one at https://site24x7.com/find-ip-address-of-web-site.html.

IPv6:Leave this field blank.

It is recommended that you choose the option "Allow my domain name's MX records" from the listed checkboxes under the "IPv6" field. This means that only the MX records stored for your domain name in the DNS zone will be able to send mail on behalf of your domain name.

Once all the above is done, click on the Apply button. Please note that the SPF Record propagation may take up to 24 hours.