What is an MX record?

An MX (Mail Exchange) record lists the hostnames that accept email for a domain and the preference order used by sending servers.

How do I check MX records for a domain?

Enter the domain above and run the lookup. You will see each priority, exchange hostname, and resolved addresses when available.

How many MX records can a domain have?

A domain can publish multiple MX records. Operators often use one primary exchange and one or more backups with higher priority numbers.

How do MX records affect email delivery?

Sending servers deliver to the lowest-preference reachable MX first. Wrong or missing MX records cause delays, soft bounces, or complete delivery failure.

How do I check Microsoft 365 MX records?

Look up your custom domain here and confirm the exchange matches the value Microsoft 365 shows in the DNS setup guide, typically ending with mail.protection.outlook.com.

What is MX Record Lookup?

A free online tool that returns live MX priorities and mail exchange hosts so beginners and admins can verify email DNS.

How does the MX Record Lookup work?

Our server queries public DNS for MX answers, sorts them by priority, and optionally resolves each exchange to IPv4 and IPv6.

How do I use the MX Record Lookup?

Type a domain, tap Lookup MX, and review the priority table. Use example chips such as outlook.com for practice.

Is this MX Record Lookup free to use?

Yes. It is free with no sign-up for students, engineers, and administrators.

Can I use the MX Record Lookup on mobile?

Yes. The tool works in mobile browsers so you can verify mail DNS during on-site changes.

Free MX Record Lookup Online, Check Email DNS MX

Free MX Record Lookup Online, Check Email DNS MX | Binary Tech