Checking email authenticity in cPanel

This extension is located under "Email → Deliverability "

Email Authentication is an important mechanism for combating spam and spoofing. It allows attaching authentic data to messages, which is used for automatic checking of both incoming and outgoing emails.

Enabling these features helps reduce the number of failed delivery notifications caused by attackers spoofing messages from your domain. It also prevents malicious actors from sending unwanted emails impersonating your domain.

• SPF (Sender Policy Framework) is an extension for the SMTP protocol, which allows the domain owner to specify in a TXT record the list of servers authorized to send email messages from that domain. Mail transfer agents receiving messages can request SPF information via a DNS query, thereby verifying the sender's server. This helps block unwanted outgoing messages spoofed from your domain.

• DKIM (DomainKeys Identified Mail) is a mechanism that allows signing outgoing messages with a cryptographic signature. DKIM adds a special header to the email with a digital signature that confirms the message has not been altered after sending and that it indeed comes from the domain owner. This technology also contributes to protection against spoofing and helps verify the authenticity of the sender.

Together, SPF and DKIM increase the security of email communication by reducing the risks of fake messages and improving the deliverability of your emails.

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