Email Address Validator
Validate an email address in two stages: strict syntax checking, then a live DNS lookup to confirm the domain can actually receive mail. The AI enhancement additionally spots probable typos like gamil.com for gmail.com.
How to use
- Enter the email address to check.
- Optionally enable the AI typo-detection enhancement.
- Click Run, you get a syntax verdict and an MX record check.
Email validation has two very different layers, and conflating them causes both false rejections and useless acceptances. Syntax validation checks the address against the format rules, a local part, an @, and a domain. The infamous fully-RFC-compliant regex is thousands of characters and still wrong in practice. Pragmatic validators (like this one) enforce the subset of the RFC that real mail systems accept.
The second layer is deliverability: does the domain exist, and does it publish MX records, the DNS entries that say which servers accept its mail? An address can be perfectly formatted and still bounce because the domain has no mail servers. The MX lookup here answers that, live.
What no online check can tell you is whether the specific mailbox exists, mail servers stopped answering that question decades ago to block address-harvesting spammers. The only true verification is sending a confirmation email, which is why double opt-in remains the standard.
The most valuable check in practice is the humblest: typo detection. A meaningful share of signup failures are gamil.com, yahooo.com, or hotmial.com, syntactically valid, MX-resolvable in some cases, and definitely not what the user meant. The AI enhancement flags these with a suggested correction.
Examples
Input: [email protected]
Output: Syntax: valid · MX records: found · deliverable domainInput: [email protected]
Output: Syntax: valid · AI suggestion: did you mean gmail.com?Frequently asked questions
Can this tell me if a mailbox actually exists?
No online tool reliably can, mail servers no longer confirm mailbox existence, precisely to stop spammers from harvesting valid addresses. This tool verifies syntax and that the domain accepts mail (MX records). Confirming the mailbox requires sending a verification email.
What is an MX record?
A DNS entry that names the mail servers responsible for a domain. If a domain has no MX records (and no fallback A record), mail to it cannot be delivered, a formatted-but-dead address.
Why do you need AI for typo detection?
Pure rules catch known misspellings of big providers, but the AI generalizes, it recognizes that hotmial.co.in is probably hotmail.com even without a hardcoded list, and explains its confidence. 10 free AI checks per day.
Do you store the addresses I check?
Anonymous checks are stateless, nothing is stored or logged. Signed-in users may keep an optional run history that they can delete anytime.
Related tools
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