DNS
Domain Name System
In one sentenceThe internet's phone book: it turns a name like evyai.com into the address of the server that should answer, and says where that domain's email goes.
What it means
When you type a domain, DNS looks up its records to find the right server. You manage those records where your DNS is hosted (often your domain registrar, like GoDaddy or Namecheap, or a service like Cloudflare).
The records you will meet most: A records (website to server address), CNAME (one name pointing to another), MX (where email is delivered) and TXT (verification and email security).
Changes are not always instant. Each record has a TTL (time to live) that controls how long the old answer is remembered, so updates can take minutes or, rarely, up to a day or two to show everywhere.
How to use it
- Before an AI agent launches an app on your domain, it will ask you to add a DNS record. Copy it exactly: type, name, value.
- Screenshot your DNS records before changing anything, so you can put them back.
- Be very careful with MX and TXT records. A wrong change can stop your email from arriving.
Prompt to try
Here is a screenshot of my DNS records. Explain in plain English what each one does, which ones my email depends on, and whether anything looks wrong or risky.
Fill in the [brackets], then paste it into evyAI, ChatGPT, Claude or Gemini.
Related terms
A Record CNAME MX Record TXT Record (SPF, DKIM, DMARC) SSL / HTTPS VPS / Server