DKIM (DomainKeys Identified Mail) and SPF (Sender Policy Framework) are email authentication methods that help improve the deliverability and security of emails sent from your WordPress site. They help prevent email spoofing and reduce the chances of your emails being marked as spam. DKIM adds a digital signature to your outgoing emails, allowing the recipient's email server to verify that the email was sent from an authorized server and hasn't been tampered with during transmission. SPF, on the other hand, is a validation system that checks if the email's sender is authorized to send emails from the specified domain. While these methods are not specific to WordPress, they play an essential role in ensuring that emails sent from your WordPress site are more likely to reach their intended recipients. To implement DKIM and SPF for your WordPress site, you will need to configure your Domain Name System (DNS) settings at the registrar with which you regsitered your domain. This process involves adding the necessary DKIM and SPF records to your domain's DNS configuration. You can find the required values in your email service provider's documentation or by contacting their support team. Once you have this information, you can update your DNS records through your domain registrar's control panel or DNS management system. You don't need plugins to set up DKIM and SPF for your WordPress site, as they are configured through your domain's DNS settings. By implementing DKIM and SPF, you can increase the chances of your WordPress emails reaching their intended recipients and provide an additional layer of authentication for your outgoing messages. See our extended article at How to set up DNS for WordPress email: SPF, DKIM, DMARC.