MX Lookup Tool
Check mail server (MX) records for any domain
About MX Records
MX (Mail Exchange) records are DNS records that specify which mail servers handle email for a domain.
Priority Numbers
- Lower = Higher Priority: 10 is tried before 20
- Same Priority: Mail servers are chosen randomly (load balancing)
- Multiple Records: Provide redundancy if primary fails
Common Mail Providers
- Google Workspace: aspmx.l.google.com
- Microsoft 365: *.mail.protection.outlook.com
- Zoho: mx.zoho.com
- ProtonMail: mail.protonmail.ch
Troubleshooting
- No MX Records: Email cannot be delivered
- Wrong Priority: May cause delays or failures
- DNS Propagation: Changes can take 24-48 hours
Frequently Asked Questions
What does priority mean?
Priority determines the order mail servers are tried. Lower numbers have higher priority. The mail server with priority 10 is tried before priority 20.
Why have multiple MX records?
Multiple MX records provide redundancy. If the primary mail server is down, email will be delivered to backup servers.
How long do DNS changes take?
DNS changes, including MX records, can take 24-48 hours to propagate globally due to caching.
Can I use my domain with Gmail?
Yes! Google Workspace provides MX records you can add to your domain's DNS to use Gmail with your domain.
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