MX records tell the internet where to deliver email for your domain. Understanding them is fundamental to email infrastructure.
What are MX Records?
MX (Mail Exchanger) records are DNS entries that specify the mail servers responsible for receiving email for a domain.
How They Work
- Sender queries DNS for recipient domain's MX records
- DNS returns one or more mail servers with priority values
- Sender connects to lowest priority number first
- Email is delivered to that server
Priority Numbers
Lower numbers = higher priority. Multiple MX records provide failover if primary server is down.
Conclusion
MX records are the backbone of email delivery. Ensure yours are correctly configured.