Sender Policy Framework, or SPF, is a verification system, that is used to stop the so-called e-mail spoofing where an e-mail message can be sent from one e-mail, but to look as being sent from another one, ordinarily with the objective to scam the recipient for some reason. When SPF protection is activated for a domain, a unique record is created for it in the Domain Name System and all of the DNS servers around the world receive it. The record contains all of the e-mail servers that are allowed to send valid messages from an e-mail address under the domain. When an e-mail is sent, the very first DNS server it encounters checks the SPF record and if the sending server is authorized, the message is sent to the target receiver. When, however, the sending server doesn't exist in the SPF record for the given domain, the e-mail message will not be forwarded and it'll be discarded. When you use this solution, it will prevent third parties from sending spam e-mails that seem to have been sent by you.
SPF Protection in Shared Hosting
If you host your domains in a shared hosting account with us and we handle the e-mails for them, you'll be able to activate SPF protection for all of them with a few clicks in your Hepsia Control Panel. The service is accessible in a section of its own where you will be able to view which domain names are currently protected. For the ones that are not, you'll be able to activate the SPF protection solution and set up various things in the process - the hostnames of the mail servers that are permitted to send messages from your e-mails, the IPv4 and IPv6 addresses of these servers, and to create a rule that emails can be sent only if your domain names include our MX records. The last solution is the most secure one, but you can use it when we handle the e-mail addresses for your domains and do not use a different email service provider. The newly created records will be activated within 1 day and nobody will be able to forge the FROM field in a message with your e-mail addresses.