Fundamentals of DNS for Email

The "phone book" of the internet. This section explains DNS (Domain Name System) as the "address book" that tells all servers where to find your domain and its services. Without DNS, your 'port' has no coordinates on the map.

13 questions in this topic

What is DNS? How does DNS relate to email? What are DNS records used for in sending and receiving mail? How does a DNS lookup work? What’s the difference between authoritative and recursive DNS? What is DNS propagation? How long does DNS propagation take? What is TTL (Time To Live) in DNS? What happens when a DNS record is misconfigured? How can DNS affect deliverability speed or reliability? What are TXT, MX, CNAME, and A records? Why do email services rely heavily on TXT records? What is DNS caching and how does it affect testing?

Questions about Fundamentals of DNS for Email