MX Lookup
Look up mail exchanger (MX) records for any domain to identify its email servers and their priorities.
Frequently asked questions
What do MX records tell you?
MX (Mail Exchanger) records specify which mail servers are responsible for accepting email on behalf of a domain. Multiple MX records can exist with different priorities — lower numbers indicate higher priority.
What does the priority number mean?
Lower priority numbers are preferred. A record with priority 10 will be tried before one with priority 20. If the primary server is unavailable, lower-priority servers act as backups.
How do I identify my email provider from MX records?
Google Workspace typically shows aspmx.l.google.com, Microsoft 365 shows *.mail.protection.outlook.com, and Proton Mail shows mail.protonmail.ch.