DMARC is an email authentication protocol. It is designed to give email domain owners the ability to protect their domain from unauthorized use, commonly known as email spoofing.
DMARC is a critical component of email cybersecurity that reduces an attacker’s ability to get email threat to an end user’s inbox. With DMARC, organizations can create a record of who is authorized to send emails from their domain. This helps to prevent misuse of a company brand in phishing campaigns.
The two primary authentication protocols that help validate that an email message comes from who it claims to come from are SPF and DKIM. Layered on top of SPF and DKIM is DMARC. DMARC uses SPF and DKIM and provides a set of instructions to receiving email servers with what to do if they receive unauthenticated mail.
Clients who use our Email Server receive SPF and DKIM by default (our managed DNS service is also highly recommended).
DMARC is an additional security layer and it’s advised if your domain has commercial value. Technically DMARC (the policy) is free. However, the reporting (service) is where the value comes in -> you KNOW when someone has attempted to spoof your domain and can take applicable action thereafter.
It only takes one scammer to spoof a domain and use it to email market unethically to ruin your email-domain’s reputation. A damaged reputation (online, algorithms) means an increased failure to deliver mail to recipients.