Email Validator & Risk Signals
Check whether an email address is well-formed, see its parts, and surface risk signals — disposable domains, role addresses, and likely typos — all computed in your browser.
- Local part
- support
- Domain
- gmial.com
- TLD
- com
⚠ Possible typo — did you mean support@gmail.com?
⚠ Role-based address (e.g. support@, info@) — often a shared mailbox, not an individual.
These are deterministic checks on the address string only: format, disposable-domain list, role detection, and common-typo suggestions. Live deliverability (MX records, SMTP, and real sender reputation) requires a server-side DNS/mail lookup and is not performed in the browser.
About this tool
This tool checks an email address against the HTML5 email format (a practical subset of RFC 5322), breaks it into local part, domain, and top-level domain, and surfaces deterministic risk signals you can read straight from the address: whether the domain is a known disposable/temporary provider, whether the local part is a role address such as support@ or info@ (usually a shared mailbox rather than a person), and whether the domain looks like a common typo of a popular provider — for example gmial.com for gmail.com. Every check here is computed locally and is fully reproducible from the address text alone. One honest limitation worth stating up front: true email validation also depends on whether the domain actually accepts mail (MX records) and whether the specific mailbox exists, plus genuine sender reputation — and those require a server-side DNS/SMTP lookup. A browser cannot perform them, so this tool deliberately scopes to the format and signal checks it can do accurately, rather than guessing.
How to use it
- Type or paste an email address.
- See whether the format is valid and how it breaks into parts.
- Review the risk signals: disposable domain, role address, or likely typo.
- For real deliverability, follow up with a server-side MX/SMTP check.
Frequently asked questions
- Does a "valid" result mean the email exists?
- No. It means the address is correctly formatted. Whether the mailbox actually exists and can receive mail depends on the domain MX records and the mail server, which require a server-side lookup this in-browser tool does not perform.
- Why does it flag disposable addresses?
- Disposable or temporary providers (Mailinator, Guerrilla Mail, 10MinuteMail, and similar) hand out throwaway inboxes often used to bypass signups. Flagging them helps you decide whether to require a permanent address. The tool checks the domain against a built-in list of common disposable providers.
- What is a "role" address and why does it matter?
- Role addresses like admin@, support@, info@, and noreply@ point to a function or shared mailbox rather than an individual. For transactional or marketing email they often have lower engagement and higher complaint rates, so many systems treat them differently.
- How does the typo suggestion work?
- The domain is compared against a list of frequent misspellings of popular providers (gmial.com, hotmial.com, yaho.com, and so on). When it matches, the tool suggests the corrected address. It is a targeted check for common mistakes, not a general spell-checker.
- What format standard is used?
- The HTML5 email input pattern, which is the same validation browsers apply to <input type="email">. It is a pragmatic subset of the full RFC 5322 grammar — it accepts essentially all real-world addresses while rejecting the obscure, rarely valid edge cases that full RFC parsing would permit.
- Is the address I enter sent anywhere?
- No. All checks run in your browser against built-in lists and patterns, with no network request, so the addresses you test are never transmitted or logged.