Paste in a domain and we'll look up its MX records — every mail server, delivery priority, and the mailbox provider actually handling inbound mail (Google Workspace, Microsoft 365, and more).
Free, no signup required. 10 checks/hour per IP.
Common questions
What is an MX record?
An MX (Mail Exchange) record tells the internet which mail server is responsible for receiving email on behalf of a domain. When someone sends mail to you@yourdomain.com, the sending server looks up your MX records to find out where to deliver it.
What does the priority number mean?
Lower priority numbers are preferred. If a domain has multiple MX records, sending servers try the lowest-priority (most preferred) host first and fall back to higher-priority hosts if that one is unreachable.
Why does my domain have no MX records?
A domain with no MX records can't receive inbound email at all — any mail sent to it will bounce. This is sometimes intentional for a send-only marketing or transactional sending domain (e.g. mail.yourdomain.com), but if your main domain has no MX record, check it wasn't dropped from DNS accidentally.
Can I tell what email provider a domain uses from its MX records?
Usually, yes. MX hostnames are provider-specific — e.g. anything ending in .google.com or aspmx.l.google.com means Google Workspace, and anything routing through protection.outlook.com means Microsoft 365. This tool flags the inferred provider automatically for major platforms.