Email Validator
Check if an email address is real before you send to it or save it.
10 of 10 free checks left.
You've used your free checks
Stop bad emails at the source instead: formvoxo filters spam and junk submissions on your website forms before they reach your inbox.
Try formvoxo freeWe look up the domain's public DNS records only. Nothing is sent to the address and we do not store the emails you check.
How to check if an email address is valid
- Type or paste one email address into the box.
- Click Check email. The validator checks the format, looks up the domain's mail server and compares it against known disposable providers.
- Read the verdict: Valid means the address is well formed and its domain accepts mail, Risky means it works but is disposable, a role inbox or a likely typo, and Invalid means mail to it will bounce.
What each check means
Syntax
An address needs a local part, an @ and a domain, with no spaces and no more than 64 characters before the @ and 254 in total. Most typos that break the format are caught here: a missing @, a double dot or a trailing comma copied from a spreadsheet.
Mail server (MX record)
Every domain that receives email publishes MX records in DNS that say which servers accept its mail. If a domain has none, and no address record to fall back on, nothing can be delivered. Some domains publish a "null MX" to say outright that they never accept email; those fail too.
Disposable domains
Temporary inbox services give out addresses that expire after minutes or hours. They are popular for skipping sign-up forms and claiming free trials more than once. The validator compares the domain, including its parent domains, with an open list of almost 10,000 known providers.
Role addresses
Addresses such as info@, sales@ and support@ reach a team rather than a person. They are fine for business enquiries, but they are a weak signal on a personal sign-up and tend to bounce and unsubscribe more.
Typos in popular domains
gmial.com, yaho.com and hotmial.com are real mistakes people make every day. When a domain is one or two letters away from a common provider, the validator suggests the likely fix so you can ask the person to confirm.
Why a "valid" result is not a guarantee
No checker can promise that a specific mailbox exists without sending to it. Large providers such as Gmail and Outlook accept every address when a server asks, then bounce later, so tools that claim to "ping the mailbox" often guess. A valid result here means the address is correctly formed and its domain is set up to receive mail. The only proof that a person owns an address is a confirmation email they click.
Keep fake emails out of your forms
Checking addresses one at a time helps with a list you already have. To stop bad sign-ups from arriving at all, put the check in front of your form. formvoxo gives any HTML form a hosted endpoint with spam filtering and bot detection, and emails you each real submission. See the docs to connect a form in a few minutes.
Want the full guide? Read How to Check if an Email Address Is Valid (Without Sending an Email).
Frequently asked questions
How does the email validator check an address? +
It checks the format, looks up the domain's MX records to confirm a mail server exists, compares the domain against a list of nearly 10,000 disposable email providers, flags role addresses such as info@ and support@, and spots common domain typos like gmial.com.
Does it send an email to the address? +
No. Nothing is sent. The check uses public DNS records only, so the owner of the address never knows it was checked.
Can it tell if a specific mailbox exists? +
Not with certainty, and no free tool honestly can. Most large providers accept every address during an SMTP check and bounce later, so mailbox probing gives false answers. A working mail server plus a clean result here is a strong signal; a confirmation email is the only proof.
What is a disposable email address? +
A temporary inbox from services like Mailinator or 10 Minute Mail that expires after minutes or hours. People use them to get past sign-up forms, so they are a common source of fake leads and abuse.
Why is a role address marked as risky? +
Addresses like info@, sales@ and support@ go to a shared inbox or a group of people. They are real, but they bounce and unsubscribe more often and are a poor fit for personal follow-ups.
How many emails can I check for free? +
Each visitor gets 10 free checks. The limit stops automated bulk use so the tool stays fast and free for people checking addresses by hand.
Need a backend for your HTML forms?
Point any form at formvoxo and get submissions in your inbox, with spam filtering built in. Free plan, no server code.
Create free account →