DNS (Domain Name System)

DNS (Domain Name System) is a hierarchical system that translates human-readable domain names (like example.com) into IP addresses, allowing web browsers and email clients to locate and connect with websites and email servers.

DNS plays a crucial role in email delivery by resolving domain names to the correct IP addresses of mail servers. Proper DNS configuration, including DNS records like MX (Mail Exchange) and SPF (Sender Policy Framework), is essential for ensuring email deliverability and protecting against phishing and spoofing attacks.