DNS + MX diagnostics
Email domain checker
See whether a domain exists, publishes mail-routing records, and which provider receives its email.
What makes an email domain valid?
A domain can exist on the web without being configured to receive email. Email delivery normally depends on MX records that tell sending servers where to route messages. This tool checks both domain resolution and MX records.
What if there is no MX record?
An address on a domain with no usable mail routing is a strong bounce risk. Use the full email verifier when you also want disposable, role-account, and mailbox signals.