How to use Valid Email Address List
- Start by entering an email address or domain in Valid Email Address List.
- Trigger Valid Email Address List and it sends the DNS lookups from your browser, not from this site.
- See the response from a public DNS resolver; Valid Email Address List only displays what comes back.
About this tool
There is no server of ours behind Valid Email Address List. Valid Email Address List validates an address syntax locally, then checks the domain MX, SPF and DMARC records over DNS-over-HTTPS.
Proving a specific mailbox exists requires sending mail, which a browser cannot do, so Valid Email Address List focuses on the DNS signals that genuinely can be checked. The MX, SPF and DMARC checks are DNS queries sent from your browser to a public resolver; this site has no backend and never sees them, and a connection is required.
Frequently asked questions
What is Valid Email Address List for?
Valid Email Address List validates the address format and checks the domain's MX, SPF and DMARC records via DNS from your browser.
Is Valid Email Address List free to use?
Yes — Valid Email Address List is completely free, with no usage limits.
Where does Valid Email Address List run its checks?
Valid Email Address List runs DNS lookups (MX, SPF, DMARC) from your browser against a public DNS-over-HTTPS resolver. This site has no backend and never sees them; the public resolver does.
Can Valid Email Address List confirm a mailbox really exists?
Valid Email Address List checks address syntax and the domain's MX, SPF and DMARC via DNS-over-HTTPS; proving a live mailbox needs to send mail, which a browser cannot do.