Sender Policy Framework, or SPF, is a validation system, which is designed to prevent the so-called email spoofing where an email message is sent from one e-mail, but to appear as being sent from another, generally with the objective to fraud the recipient in some way. When SPF protection is activated for a domain, a special record is created for it in the Domain Name System and all the DNS servers around the world get it. The record contains all of the mail servers that are permitted to send valid messages from an e-mail address within the domain. When an email is sent, the first DNS server it goes to verifies the SPF record and if the sending server is permitted, the message is forwarded to the target destination. In case, however, the sending server is not contained in the SPF record for the specified domain, the message won't be forwarded and it'll be discarded. When you use this solution, it will prevent third parties from sending spam messages which appear to have been sent from you.
SPF Protection in Hosting
You are able to activate the SPF protection option for your domains with a few clicks in the Hepsia Control Panel, which comes with our Linux hosting. This is done from the section bearing an identical name and you'll be able to set up the protection for any domain on our state-of-the-art cloud platform. Using a really convenient interface, all you'll need to type in is the hostname of the mail server that will be approved to send messages from your e-mail addresses and its IPv4 or IPv6 address. Of course, you're able to add several servers too, when needed. In case your e-mail addresses are managed on our end, you can also use an even more risk-free option by setting a restriction that e-mail messages can be sent only if your domains have our MX records. This alternative cannot be used when your site is hosted here, but the email addresses are with a third-party provider. In either case, the SPF protection option can really enhance your online safety and prevent others from counterfeiting your e-mail addresses.