Onboarding a company
Confirm the domain spelling before storing a new business contact. A provider label is a clue, not a company identity check.
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.
Put the result to work
Find out whether the domain has a mail destination
A domain can host a website, accept mail, do both or do neither. Check the mail-related DNS response before assuming that a working website makes an address deliverable.
Copy the part after @
Check the exact domain. A small spelling difference can point to a completely different destination.
Read resolution and routing
Review whether DNS resolves and whether explicit MX records are returned.
Check the address itself
After the domain review, run the full checker for format and address-level signals.
Worked examples
What the evidence tells you
Illustrative scenarios, not live results for the addresses or records shown. Open a scenario to see the next action.
01Website loads, but no MX is returned
Web and mail are separate
A website response is not evidence that the domain has configured mail reception.
Next action Review the published mail setup.
02MX records are returned
Mail routing is published
The domain lists receiving servers. Individual recipients can still be missing or blocked.
Next action Run an address-level check.
03DNS lookup fails temporarily
Evidence unavailable
A resolver timeout differs from a confirmed nonexistent domain.
Next action Retry later and preserve the unknown result.
Use it with a purpose
Where this tool fits
Investigating a bounce
Check whether the address points to a domain that has lost or replaced its mail records.
Before you decide
Questions about this tool
Is this a domain ownership check?
No. It reads public DNS information.
Can a parked domain receive email?
It can if its mail records and receiving service are configured. Website appearance alone does not settle that question.
Should I enter www before the domain?
Use the exact email domain. For alex@example.com, check example.com, not www.example.com.
