Marketing Calendar 2026
DomainKeys Identified Mail (DKIM)
DKIM is an email security standard that helps confirm that an email really comes from where it says it does and wasn’t tampered with along the way. It works by adding a digital signature to the email’s header, which the recipient’s mail server can verify.
When a company sends an email, DKIM adds a unique digital signature to the message. This signature is based on a private key tied to the company’s domain. The receiving mail server uses a matching public key published in the sender’s DNS records to confirm the message is genuine and unchanged.
This process helps prevent email spoofing and phishing, which are common risks in digital communication. For SaaS and marketing teams, DKIM plays a critical role in improving email deliverability, protecting your domain, and building trust with recipients. Whether you’re sending newsletters, onboarding emails, or promotions, DKIM helps ensure your message gets to the inbox and stays believable.