What is a credit, do credits expire?

1 credit = 1 email verification. You buy credits once and use them whenever you like — they never expire.

What is your accuracy guarantee?

We guarantee 97% verification success. If verification success falls below 97%, you get your money back.

Which checks are performed?

Every address goes through 9 steps: duplicate removal, spam-trap, risk analysis, MTA/MX verification, domain control, complaint matching, spelling mistakes, authenticity control and temporary error control. Full verification, including MX and SMTP checks, runs in the panel.

Yes. The lists you upload are stored encrypted and never shared with third parties.

Can I verify via the API?

Yes. Everything in the panel is in the API too: documented REST endpoints for single and bulk verification, plus a webhook notification when the job completes.

Which file formats can I upload?

You can drag and drop CSV and XLSX files. The result report downloads as CSV with valid, risky and invalid labels.

Email Verification

Clean your list, protect your reputation

Verify your email list before you launch a campaign. Invalid, risky and spam-trap addresses are filtered with a 9-step check — your IP and account reputation go up, and so do your open rates.

Start free See pricing

No credit card required 97% verification guarantee Your data is stored encrypted

app.qulaq.com/verify

subscriber-list-2026.csv 24,812 addresses · 3 min 24 s

Completed

Valid %92,4 22.926 addresses

Risky %4,1 1.018 addresses

Invalid %3,5 868 addresses

Spam traps: 0 · Duplicates: 214 removed Download clean list

97% verification · money-back guarantee

How it works

A clean list in three steps

Upload your list and download the clean version in minutes. From the panel or via API.

Upload your list

Drag and drop your CSV or XLSX file, or send addresses directly via the API.

9-step verification

Every address goes through MX, SMTP, spam-trap and risk checks; problem entries are flagged.

Download the clean list

A detailed report labelled valid, risky and invalid; the clean list downloads as CSV in one click.

9-step check

Every address goes through these filters

Upload your list; every address runs through nine separate checks — problem entries are flagged or removed.

STEP 1

Duplicate removal

Repeated records of the same address are removed automatically.

STEP 2

Spam-trap cleaning

All records matching our intelligent spam-trap indicators are cleared.

STEP 3

Risk analysis

Addresses are scanned for high-risk keywords.

STEP 4

MTA / MX verification

MX records of every domain are looked up; domains that can't receive mail are removed.

STEP 5

Domain control

Each domain is validated as real and currently active.

STEP 6

Complaint matching

Addresses matching complainant databases are removed from the list.

STEP 7

Spelling mistakes

Syntactically invalid addresses are removed and common typos caught.

STEP 8

Authenticity control

Questionable addresses receive a verification email to confirm they exist.

STEP 9

Temporary error control

Addresses with temporary delivery issues are detected and flagged.

Why verify?

Clean list, high reputation, lower cost

Sending to invalid addresses raises your bounce rate, hurts IP reputation and can get you blacklisted. A verified list does the opposite.

Your IP and sender account reputation improve

Bounce and complaint rates drop, blacklist risk shrinks

You send to real people — open rates go up

You stop paying for dead addresses, sending costs go down

Verification success

97% with a money-back guarantee

Bounce rate ▼ 8.4% → 0.9%

Open rate ▲ 12% → 31%

Spam complaints ▼ 0.4% → 0.05%

For developers

Automate verification via the API

In your signup form, import flow or batch jobs — everything in the panel is in the API too. Single address or bulk list, the same 9-step check.

Documented REST endpoints — single and bulk verification Webhook notification when a job completes Automatic sync with your suppression list

SAMPLE REQUEST

$ curl -X POST https://new.qulaq.com/api/v1/verify \
  -H "Authorization: Bearer qlq_live_…" \
  -d '{"email": "ayse@sirket.com"}'

{
  "result":  "deliverable",
  "score":   0.98,
  "checks":  { "mx": "pass", "smtp": "pass", "spam_trap": "pass" },
  "credits_left": 9840
}

Pricing

How many addresses will you verify?

1 credit = 1 email verification. Buy credits once, use them anytime — they never expire.

Credits

Price

/ 1,000 verifications

Buy credits

Prices in USD · credits never expire

FAQ

Frequently asked questions

97% verification · money-back guarantee

Clean your list today

Upload your list and download the clean version in minutes. If verification success is below 97%, you get your money back.

Start free See pricing

No credit card required Your data is stored encrypted

From the blog

Blog

July 12, 2026

Why your bounce rate climbs — and how to bring it down

A high bounce rate burns your IP reputation. Here's what causes it and how 9-stage verification fixes it.

July 12, 2026

What is a spam trap? The invisible danger in your list

Spam-trap addresses aren't real people. Email them and you'll land on a blacklist.

July 12, 2026

List hygiene: why a clean list saves more than money

Emailing dead addresses costs you more than budget — it costs you your reputation. Here's the ABC of list hygiene.