Free Email Checker
Mail Bounce Pro is a free email checker and email verifier for business addresses. Enter an address and see whether it is likely to accept mail before you send a campaign. Free accounts get 50 credits per rolling 24 hours, and one credit checks one email address.
Check an email address for free
- Open the tool and choose the Single Email tab.
- Log in or create a free account. A free account is needed to run a check.
- Type the address, complete the quick human check, and start the verification.
- Read the result label and use it to decide whether to send.
What the free email verifier checks
Every address goes through the same five checks, whether you are on the Free plan or a paid plan:
- Syntax: is the address written in a valid format?
- MX records: is the domain set up to receive email?
- Disposable domains: does the address belong to a temporary-email service?
- Role accounts: is it a shared mailbox such as info@ or support@ rather than a person?
- Live mailbox check: the recipient's mail server is asked whether the mailbox would accept mail, without sending a message. Catch-All domains are detected as part of this step.
What each result means
Valid
The mail server indicated that the mailbox accepts mail.
Invalid
The mailbox does not exist or the domain cannot receive email.
Do-Not-Mail
An address you should not send to, for example one on a disposable (temporary) email domain.
Catch-All
The domain accepts mail for any address, so one specific mailbox cannot be confirmed.
Unknown
The mail server did not give a clear answer, so the address cannot be confirmed either way.
Read more about Catch-All results in catch-all emails explained, or see how email verification works.
Email checker free: what the Free plan includes
- 50 credits per rolling 24 hours, counted from your first use rather than from midnight.
- One credit per email checked, including Catch-All and Unknown results.
- A free bulk upload can contain up to 50 emails per file, within your available credits.
- Paid credit packs are available when you need more; paid credits never expire. See pricing.
Email address checker and email validator for one address
Use it as an email address checker when you only have one address to test. You can check an email address in a few seconds: it works as a real-time email checker and single email verifier, because the live mailbox check asks the recipient's mail server at the moment you run it. In one step it is also an email validity checker, an MX record email checker and a syntax email checker. If you want to verify an email address free of charge, the Free plan covers 50 checks per rolling 24 hours, and an email check on a Catch-All or Unknown address still uses one credit.
Check if an email address exists before you send
Use this email checker online to check if an email address exists and can receive mail before it goes into a campaign, a signup form or a sales sequence. Free email verification like this helps you catch typos, temporary addresses and mailboxes that do not exist, so fewer messages bounce.
When a free check is not enough
No email checker can promise that every address will be delivered. Catch-All and Unknown results exist because some mail servers accept everything or refuse to answer. If you have a list instead of a single address, use the bulk email verification tool. If you only know a name and a company, try the Email Finder.
Free email checker FAQs
Is the email checker really free?
Yes. Free accounts get 50 credits per rolling 24 hours, and one credit checks one email address. You need a free account to run a check.
How many emails can I check for free?
Up to 50 per rolling 24 hours on the Free plan, since each check uses one credit. A free bulk upload can contain up to 50 emails per file, within your available credits.
Does the checker send an email to the address?
No. The live mailbox check asks the recipient's mail server whether the mailbox would accept mail, without sending a message.
Can an email checker guarantee that an address is valid?
No. Some mail servers accept every address (Catch-All) or do not give a clear answer (Unknown), so those results cannot be confirmed either way.
Is an email validator the same as an email checker?
In everyday use, yes. Email checker, email validator and email verifier all describe a tool that tests whether an address is valid. This email validation tool runs five checks (syntax, MX records, disposable domains, role accounts and a live mailbox check) and returns a result label.
Can I verify an email address online for free?
Yes. Log in with a free account, open the Single Email tab, and verify an email address online within your 50 credits per rolling 24 hours.
Ready to try it? Open the email verification tool.