MailTester removes invalid, risky and disposable addresses from your lists and shows you exactly where your campaigns land — before you press send. 99% accuracy, results in seconds.
100 free verifications · No credit card required
Enter any address to run a real verification — syntax, MX, mailbox and disposable checks.
Trusted by teams at
Most tools stop at “is this address real?” MailTester goes further: it verifies every address, then tests where your actual campaigns land — inbox, promotions, or spam — and watches the blacklists in between.
Twelve verification engines scrub every address — syntax, MX, live SMTP, spam traps, disposables, complainers — so you only pay to email people who exist.
Send a real campaign to our seed network and see, provider by provider, whether you hit the inbox, the promotions tab, or spam — plus blacklist monitoring around the clock.
Each address on your list runs the full gauntlet. Anything that would bounce, complain, or trap you gets caught before you send.
We open a live connection to the receiving mail server for every address — no cached verdicts, no guessing.
Known and suspected spam traps are flagged before they torch your sender reputation with Gmail and Outlook.
Every address gets a 0–100 risk score, so you decide exactly how aggressive or careful each send should be.
We verify the receiving mail transfer agent actually accepts mail — catching dead servers that pass DNS checks.
Expired, parked and misconfigured domains are caught instantly, before a single send is wasted on them.
Addresses with a history of marking mail as spam are flagged from our continuously updated complainer list.
RFC-compliant syntax checking with typo correction — gmial.com becomes gmail.com before it bounces.
Temporary inboxes from 4,000+ disposable providers are caught the moment they hit your signup form.
Exact and normalized duplicates are merged automatically, so you never pay to verify the same person twice.
Greylisted servers get automatic, correctly timed retries — turning “unknown” results into definitive answers.
Invite your whole team, share one credit pool, and keep per-member activity visible to admins.
Export exactly the slice you need — deliverable only, risky only, or any custom segment — in CSV or XLSX.
Whether you are checking one address at signup or auditing a five-million-row list, the same engine does the work.
Paste an address, get a verdict: deliverable, risky, or undeliverable — with the full evidence trail behind it. Perfect for sales teams qualifying leads one at a time.
Sync lists from your ESP or CRM, verify them, and push clean segments straight back — no CSV gymnastics.
Buy credits once and use them whenever — they never expire. Or subscribe and get verification, inbox testing and monitoring bundled at a lower rate.
How many emails do you need to verify?
50,000credits
$79
$0.0016 per email
5K
$19
$0.0038
10K
$29
$0.0029
30K
$49
$0.0016
50K
$79
$0.0016
100K
$159
$0.0016
300K
$299
$0.0010
500K
$399
$0.0008
1M
$499
$0.0005
2.5M
$999
$0.0004
5M
$1,699
$0.0003
10M
$2,999
$0.0003
Verifications, email searches, inbox reports and blacklist monitors in one plan. Yearly billing takes 30% off.
For solo senders keeping a single list clean.
$39/mo
save 30% on yearly billing
For marketing teams sending every week.
$79/mo
save 30% on yearly billing
For agencies and high-volume senders.
$199/mo
save 30% on yearly billing
For platforms verifying at serious scale.
$299/mo
save 30% on yearly billing
From solo newsletters to agencies cleaning lists for a dozen clients — here is what changes when the bad addresses are gone.
When I signed up for MailTester.com, I was a bit skeptical at first. How much difference can it make for a relatively smaller company like us? Answer: a lot. We didn't change our email strategy much, still our email open rate has increased like 3-4%. I recommend MailTester.com.
We were looking for a mail validation service that can handle a large volume of emails and return accurate results. Now MailTester.com is our go-to solution.
We are a small startup and can't afford to spend hundreds of dollars every month on email verification. MailTester.com's flexible pricing plan works for us.
Efficient, reliable and pocket friendly — I love MailTester.com. I have personally recommended this app to my entrepreneur friends.
Mailtester is awesome. We have big lists here with us and we keep them clean with MailTester.com. It never disappoints.
I am a fan. MailTester.com is super accurate and easy to use. I set it up and forget about it.
Stop paying to email addresses that do not exist. Every new account starts with 100 free credits — no credit card, no sales call.