DKIM, SPF, and DMARC work in tandem to authenticate the sender of an email and prevent email spoofing:
DKIM: Adds a digital signature to the email header to verify the sender's domain. SPF: Lists authorized IP addresses that can send emails on behalf of your domain. DMARC: Uses the information from DKIM and SPF to determine the authenticity of the email and instructs the email receiver on how to handle failed checks.