This free email checker tells you if an address will bounce before you send.
Paste any email address. We check the format, the domain's mail server and the mailbox itself, and a second, independent provider checks again every address the first one doesn't reject. Nothing is ever sent to the address.
- 3 free checks a day, no signup.
- Half of all checks answer in 7 seconds or less.
- Got a list? Clean it free here, then verify it in Emailchaser on a 7-day free trial.
Check time measured on 118 free checks on this checker, 2 to 5 October 2026.
3 free checks a day. No signup.Example result
This mailbox exists and accepts email. It is safe to send.
- Format
- Valid
- Mail server
- Google Workspace
- Mailbox
- Exists
- Catch-all domain
- No
- Shared inbox
- No
- Personal webmail
- No
Paste addresses, or drop a .csv or .txt file here. Up to 10,000 rows. The file is read in your browser. Only the 3 addresses you check free are sent to us.
Every result comes with the reason and the details that decided it.
The verdict is one word. Underneath it you see who runs the domain's mail, whether the mailbox was confirmed, and whether the address is a shared inbox or a personal webmail account, so you know what to do with it.
This mailbox exists and accepts email. Safe to send.
- Mail server
- Microsoft 365
- Mailbox
- Exists
- Catch-all domain
- No
What to do: keep it in your campaign.
This domain accepts every address, so no server can prove one mailbox exists. Neither of our two providers rejected this one.
- Mail server
- Proofpoint
- Mailbox
- Can't be proven
- Catch-all domain
- Yes
What to do: send it in a smaller, separate batch, so a few bounces can't lift your overall bounce rate.
This mailbox does not exist or can't receive email. Sending to it would bounce.
- Mail server
- Google Workspace
- Mailbox
- Can't receive email
- Shared inbox
- No
What to do: remove it, and keep it on your do-not-email list.
Unknown means the mail server did not answer in time, often on purpose (a delay called greylisting). It is not the same as undeliverable: check the address again later. All addresses shown on this page are examples.
Have a whole list? Drop it in and we clean it in your browser before you verify it.
Cleaning is free and runs on your computer: duplicates and broken addresses come out and shared inboxes are flagged before you spend anything. Your 3 free checks go to the first three rows, and the rest of the list is verified in Emailchaser.
Drop a .csv or .txt file here
Or paste addresses, one per line. Up to 10,000 rows. The file is read in your browser. Only the 3 addresses you check free are sent to us.
Your 3 free checks, used on the first three rows:
- lena.ortiz@vantorahq.exampleDeliverable
- p.mendes@kelpline.exampleDeliverable
- sam@oldcobaltgroup.exampleUndeliverable
- 1Clean it hereFree, in your browser, for any list up to 10,000 rows.
- 2Verify it in EmailchaserYour 7-day free trial checks 100 addresses from your list, each with two providers. Paid plans verify up to 50,000 addresses in one job.
- 3Download or sendGet a verdict for every address as a CSV, or send to the good ones in a campaign with follow-ups.
Every address the first provider doesn't reject goes to a second, independent provider, so a catch-all gets a second opinion.
The free checker runs the same double verification an Emailchaser campaign runs before its first send to an address:
- FormatThe address is written correctly: one @, nothing illegal before it, a real domain after it.
- Mail serverThe domain has MX records, so something is set up to receive its mail. We also name who runs it: Google Workspace, Microsoft 365, or a security gateway such as Proofpoint or Mimecast.
- Mailbox, first providerThe first provider asks the mail server whether this exact mailbox exists, then hangs up before any message is sent.
- Mailbox, second providerEvery address the first provider doesn't reject, catch-all domains included, is checked again by a second, independent provider before you get a verdict.
Catch-all and unknown answers come most often from security gateways and Microsoft 365. Roughly 68.9% of the 499 business domains we measure in our Inbox Rules Index sit behind one of the two (measured 5 September 2026), which is why a second opinion matters for B2B lists.
“george the new email double verification is so superior. bounce rates are 0% or 1% now (before 3%). good work”
Watch the double verification check an address inside Emailchaser.
A short walkthrough of the two-provider check an address goes through before a campaign sends to it. The checker on this page runs the same check on one address at a time.
At each tool's smallest paid option, Emailchaser verifies 1,000 addresses for less than half the price.
Verification in Emailchaser is billed per check on top of any plan, and the plan also sends your campaigns. The tools built only for verification sell credit packs.
| Tool | Price per 1,000 addresses | What you pay for it | Sends your campaigns too |
|---|---|---|---|
 EmailchaserStart my free trial | Price per 1,000 addresses$1.70 to $3.40 | What you pay for it$0.0017 per provider check, on any plan from $47 a month. Each address gets up to 2 checks. | Sends your campaigns tooYes, 5,000 to 500,000 emails a month |
 Emailable | Price per 1,000 addresses$7.60 | What you pay for it$38 for 5,000 credits, pay as you go | Sends your campaigns tooNo |
 Hunter | Price per 1,000 addresses$12.25 | What you pay for itStarter plan, $49 a month for 2,000 credits; one verification uses 0.5 credit | Sends your campaigns tooYes |
 ZeroBounce | Price per 1,000 addresses$19.50 | What you pay for it$39 for 2,000 credits, its smallest pay-as-you-go pack | Sends your campaigns tooNo |
Prices read from each company's pricing page on 6 October 2026. An Emailchaser address costs one check when the first provider rejects it and two otherwise.
Checking an address never sends that person an email.
The check opens a connection to the recipient's mail server, asks whether the mailbox exists (the RCPT TO step of the conversation a real email would start) and disconnects before any message is sent. Nothing lands in the inbox, and the owner is not told.
We use the address only to run the check and to keep the free limit. If you need someone's address in the first place, the free email finder finds it from a name and a company.
These are the questions people ask most about checking an email address.
Yes. Every visitor gets 3 free checks a day with no signup: use all three at once, and one comes back every 8 hours after that. To verify a whole list, drop it in the list tab and finish it in Emailchaser.
Paste the address into the box at the top of this page and press Check email. You see whether it is deliverable, risky (catch-all), undeliverable or unknown, with the reason and the mail server behind it; half of all checks answer within 7 seconds. Nothing is sent to the address.
Yes. Email checker, email verifier and email validator are three names for the same test: the address format, the domain's mail records and the mailbox itself. This tool runs all three, and a second provider checks again every address the first one doesn't reject.
A catch-all domain accepts mail for every address, so its server can't confirm that one mailbox exists. Some of those addresses deliver and some bounce. Both of our providers check each one, and we suggest sending catch-all addresses in a smaller, separate batch.
The mail server did not give a yes or no in time, usually because it delayed the check on purpose (greylisting) or timed out. Unknown is not undeliverable. Check the address again in a little while.
Rarely. A mailbox can be closed after you check it, which is why lists older than 30 to 90 days are worth checking again before a campaign.
Yes. Drop a .csv or .txt file into the list tab and it is cleaned free in your browser, up to 10,000 rows, and your 3 free checks run on its first rows. Then verify it in Emailchaser: the 7-day free trial checks 100 addresses from your list, and paid plans verify up to 50,000 addresses in one job at $1.70 to $3.40 per 1,000.
Yes. Emailchaser's REST API runs list verification jobs, and the MCP server lets Claude or Cursor start one and read the results.
Verify your lists and send to the good addresses from the same place.
7-day free trial on every plan.
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