Check the address.
Read the evidence.
Check up to 20 email addresses for format, public MX records, no-mail policies, role patterns, and common provider typos. Free DNS-based checks with clear results and downloads.
Know what the evidence supports.
Review address format, published MX records, explicit no-mail policies, common provider typos, and role-address patterns.
Finding a mail server does not prove a recipient exists. Results distinguish confirmed DNS observations from checks that require further review.
Read the routing result in context.
An MX record names a domain’s email destination. A Null MX record explicitly says a domain does not accept email. When MX records are absent, SMTP can fall back to A or AAAA records; a website address alone does not prove an email server is listening.
Does this confirm a mailbox can receive email?
No. DNS describes domain-level routing. Confirm mailbox ownership through an appropriate confirmation workflow, and use a dedicated verification service when you need mailbox-level checks. A catch-all server, temporary rejection, or provider policy can make those checks inconclusive too.
What should I do with an inconclusive result?
Retry after checking your connection. DNS failures and timeouts are not invalid-address verdicts. Confirm suspected typos with the address owner, and keep opt-out and suppression records intact.
Bring your own context.
Tell us what you are working on. Let’s find a useful next step.