Email Validator
Check an email address's syntax and whether its domain has MX records.
Validate an Email Address
Enter an email address and this tool checks two things: whether the address is syntactically valid, and whether its domain publishes MX records â the DNS entries that tell the world where to deliver its mail.
What it checks
- Email syntax against a practical RFC pattern
- Whether the domain has MX (mail server) records
- The mail servers and their priorities
- Both checks run instantly
Syntax vs. deliverability
Valid syntax plus existing MX records means an address is well-formed and its domain can receive mail. It does not prove the specific mailbox exists â only the mail provider can confirm that.
Why MX records matter
MX records point a domain to its mail servers. If a domain has no MX records, mail sent to any address at that domain generally cannot be delivered, so checking them is a strong, fast signal of whether an address is usable.
What this can't do
This tool deliberately does not send test messages or probe mailboxes, which is intrusive and unreliable. It validates the address shape and the domain's ability to receive mail â the safe, privacy-respecting checks that catch the vast majority of bad addresses.
Frequently Asked Questions
Common questions about the Email Validator.