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Email verification

Stop bouncing. Start landing.

DitLead verifies every email against 18 signals before you send. Real-time API and bulk CSV verification — both wired into the same engine that protects every sequence.

18 signals: syntax · MX · SMTP · catch-all · role · disposable · bounces
Real-time API at <300ms — block bad addresses at intake
Bulk CSV up to 5M rows, with clean export back
Verification built into every sending step
Included on every paid plan — no per-verification cost

Start free trial See verification in action

7-day trial · Credit card required · Cancel anytime

Verifying · 18,420 contacts97% deliverable

anna.k@stripe.comValid

marcus@figma.comValid

info@old-domain.ioInvalid

p.chen@notion.soValid

team@catchall.coRisky

sara@duplicate.comDuplicate

ceo@startup.ioValid

VALID

17,887

INVALID

312

RISKY

154

DUPE

Why bounce rates stay under 2%4 metrics

A verifier engineered for cold volume

METRIC / 01

Signals checked per email

Syntax · MX · SMTP · catch-all · role · disposable · bounces · more.

METRIC / 02

<2%

Avg bounce rate after verify

Most customers land between 0.6% and 1.4%.

METRIC / 03

300ms

Real-time API latency

Validate on form submit, signup or CRM intake.

METRIC / 04

10–25

Verifications per second

Bulk validate a 50K list in under an hour.

In the product

Verified lists, ready to send.

Upload a list and see verified, valid and invalid counts per list — email verification is built into the same workspace as your campaigns.

DitLead lists and validation screen showing per-list verification and valid counts

Benchmarks8 metrics

What teams ship on DitLead.

Illustrative benchmarks, not measured guarantees — your results depend on ICP, offer, list quality and copy.

VALIDITY

99.5%

Match accuracy on syntax + MX + SMTP

VERIFY TIME

<2s

Per address, async + parallel

BOUNCE PROTECTION

<1%

Customer bounce rate on verified lists

CATCH-ALL FLAGS

Yes

Risky domains surfaced separately

ROLE / DISPOSABLE

Yes

Detected and tagged automatically

FREE CREDITS

10k

Per month on every paid plan

API + UI

Both

Bulk UI for lists, single API for forms

RETENTION

Unlim

Verification cached, never re-billed

How it works

Bulk or real-time — same 18-signal engine

DitLead runs the same scoring whether you upload a million rows or hit the API once. Verdicts are consistent across both paths.

STEP / 01

Drop in a CSV — or hit the API

Bulk-verify lists up to 5M rows, or wire the API into your forms, CRM or scraper. Both share the same engine.

STEP / 02

18-signal scoring

Syntax, MX, SMTP handshake, catch-all, role accounts, disposables, bounce and complaint history — combined into one verdict.

STEP / 03

Clean list back to you

Verified, risky and invalid buckets in your dashboard — plus an exportable CSV ready to feed straight into a campaign.

Inside verification

Catch the addresses that kill reputation

Most bounce-rate problems aren't typos — they're catch-alls, role inboxes and abandoned accounts. DitLead scores every one.

01 · Bulk

Bulk verify a million-row list overnight

Upload any CSV up to 5M rows. DitLead splits the job across workers and returns a verdict per row plus a clean export — usually in under an hour for 50,000 rows.

CSV up to 5M rows, multi-column maps
Verdicts: Valid · Risky · Invalid · Duplicate · Catch-all
One-click push of cleaned list into a sequence

Verifying · 18,420 contacts97% deliverable

anna.k@stripe.comValid

marcus@figma.comValid

info@old-domain.ioInvalid

p.chen@notion.soValid

team@catchall.coRisky

sara@duplicate.comDuplicate

ceo@startup.ioValid

VALID

17,887

INVALID

312

RISKY

154

DUPE

02 · Real-time

Verify the moment a lead is captured

Drop the JS widget on a form, or wire the API into signup, CRM intake or scraping. Verification finishes in 300ms — fast enough to block bad addresses at the source.

JS widget · REST API · Webhooks
Validate on signup, CRM intake or form submit
Block disposables, role accounts and typos inline

Read the API docs

PLATE · 01Sender pool · livefig.

Capacity∞Unlimited

alex@acme.ioActive

84%

alex@acme.coActive

71%

sales@acme.ioActive

62%

ops@acme.coWarming

48%

team@trygrowth.comWarming

31%

SENT TODAY

12,847

+18%

INBOX

95.1%

primary

OPEN RATE

71%

30d avg

03 · Built-in

Filter every sequence before it ships

Verification is wired into every send step in DitLead. Invalid and risky addresses are filtered out before a campaign launches, so you never burn reputation on bad data.

Auto-skip invalid + risky addresses on send
Configurable threshold (strict / standard / loose)
Reputation protected on every campaign

How it integrates

Deliverability score+12 this week

92Excellent

SPFPass

DKIMPass

DMARCPass

Spam-word check0 flagged

Custom tracking domaintrack.acme.io

Blacklist statusClean · 12 lists

What's inside

Every signal that protects your sender

The features that turn a noisy list into clean send-ready data.

FEAT / 01

18 verification signals

Syntax, MX, SMTP, catch-all, role, disposable, gibberish, recent bounces and more.

Per address

FEAT / 02

Real-time API

300ms latency. Validate on signup, form submit or CRM intake.

<300ms

FEAT / 03

Bulk CSV up to 5M

Drop a file, get verdicts and a clean export back. Most 50K lists complete in <1h.

5M rows

FEAT / 04

Smart deduplication

Cross-list duplicate detection by normalized address, name and company.

Auto-dedupe

FEAT / 05

Disposable detection

10-minute mail, tempmail, plus-aliases and catch-all domains flagged automatically.

10K+ domains

FEAT / 06

Wired into sending

Risky + invalid addresses filtered before every campaign — reputation protected.

Auto-skip

The trade

What you get vs. what you stop tolerating.

Left is what arrives the day you switch. Right is the busywork you stop maintaining.

INCLUDEDWhat you get10 items

01Syntax + MX + SMTP-level real-time validation
02Catch-all, role-based, and disposable detection
03Bulk UI for lists + REST API for signup forms
04Verification cached — never re-bill the same address
05Per-result confidence score and rationale
06Integrations with HubSpot, Salesforce, Pipedrive
07Auto-suppression of hard-bounces in subsequent sends
08GDPR-safe processing, EU-resident option on Enterprise
09Real-time webhook on bulk-job completion
1010,000 free credits/month on every paid plan

EXCLUDEDWhat you skip10 items

01Hitting 8% bounce rate on a stale list
02Paying $0.008/verification on a per-address pricing tier
03Re-verifying the same address every quarter
04Sending to role addresses you should have filtered
05Catch-all domains landing in spam silently
06List import that takes 20 minutes per CSV
07No flag for risky disposable domains
08Manual deduplication between verification runs
09API rate-limits that throttle real-time form validation
10Bounces hurting reputation across the whole sender pool

vs the alternatives6 rows

The verifier that doesn't cost extra

Stand-alone verifiers charge per 1,000 addresses. DitLead's is built in, with more signals.

Capability	DitLead	Apollo	Instantly	Smartlead	Lemlist
Real-time + bulk verification
Signals checked per address	18	10	12	14	9
Catch-all + role detection					Limited
Built into sending				Add-on
Cost per 10K verifications	Included	$70	$59	$49	$80
Bulk file size limit	5M rows	1M	500K	1M	250K

FAQ11 entries

Verification, explained

Still curious? Our team responds in under an hour.

Talk to sales

Every address is checked against 18 signals: syntax, MX records, SMTP handshake, catch-all status, role accounts, disposable domains, gibberish patterns, recent bounces, complaint history and more. Each is scored and combined into a Valid / Risky / Invalid verdict.

Under 2% on a verified list — most customers see 0.6–1.4%. That keeps you well below Gmail and Outlook's spam thresholds and protects sender reputation.

Yes. The API and JS widget validate on form submit in under 300ms. Use it on signup forms, lead-gen forms and CRM intake to keep your database clean from day one.

Roughly 10–25 emails per second per worker — most lists of 50,000 finish in under an hour. You upload a CSV, DitLead validates, and the cleaned file plus a verdict report drops back in your dashboard.

Yes. Verification is built into every sending step. Risky and invalid addresses are filtered out automatically before a sequence ships, so you never burn reputation on bad data.

Three layers: (1) syntax + RFC validation, (2) MX-record + DNS lookup, (3) SMTP handshake without delivery. Combined, this hits 99.5% accuracy. Catch-all domains where SMTP can't conclusively prove existence are surfaced with a separate "risky" flag.

Yes. The bulk UI accepts CSV up to 5M rows with async processing and webhook on completion. The REST API verifies single addresses in under 2 seconds, ideal for signup forms and real-time validation.

A catch-all is a mail server configured to accept every address at the domain, valid or not. SMTP can't confirm a specific inbox exists. We flag these as "risky"; many customers still send to them at lower volume since they're often valid in practice.

Yes. Disposable (mailinator, tempmail), role-based (info@, sales@), and typo-corrected suggestions (gmial.com → gmail.com) are all detected and tagged. Suppress, accept, or auto-correct per campaign.

10,000 verifications/month are included on every paid plan. Beyond that, $4/1000 on Scale and $2/1000 on Enterprise. Cached results never re-bill — verify the same address twice within 30 days, only the first counts.

No. Verification runs async after upload, with the campaign continuing on already-verified rows. Median time-to-complete is under 1 minute per 10K addresses. Webhook fires when the full list is verified.