Live deliverability engine

Hit real inboxes. Skip the bounces.

Surewyse screens every address through six checks (syntax, MX, disposable, role, SMTP, catch-all) and returns a deliverability score in seconds.

Start verifying free See how it works

✓ 100 free verifications ✓ No credit card ✓ CSV bulk + API

surewyse · live demo

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✓Syntax check …
✓MX records …
✓Disposable domain …
✓Role account …
✓SMTP probe …
✓Catch-all …

Pending

Score

↑ This is a real demo. Checks run server-side.

Who it's for

Built for every team that sends email.

Whether you run campaigns, build products, or close deals, bad addresses are costing you. Surewyse fixes that before it happens.

Email Marketers

Clean your list before every send. Lower bounce rates, protect sender reputation, and land in the inbox, not the spam folder.

Developers & SaaS

Validate emails at signup via API. Block throwaway addresses, reduce fake accounts, and keep your onboarding data clean from day one.

Sales Teams & SDRs

Scrub prospect lists before your cold outreach. Stop wasting sequences on dead addresses and focus your energy on real leads.

Agencies & Freelancers

Bulk-clean client lists, export clean segments by result, and deliver campaigns that actually perform, every time.

↓

Fewer bounces. Hard bounces damage your sender score. Verify first, send clean.

↑

Better open rates. Real addresses open emails. Disposables and role accounts don't.

✓

Inbox, not spam. High bounce rates trigger spam filters. Keep them low, stay in the inbox.

How it works

Six checks. One verdict.

Every address flows through this pipeline in parallel. The signal you see lighting up the line below is what actually happens, animated faster.

1 Syntax

2 MX

3 Disposable

4 Role

5 SMTP

6 Catch-all

Syntax

RFC 5322 + practical edge cases real mail servers reject.

MX

DNS lookup confirms a live mail exchanger.

Disposable

Blocks throwaway domains across thousands of providers.

Role

Flags admin@, support@, info@ and other low-converting role addresses.

SMTP

Talks to the destination server and asks if the box exists.

Catch-all

Detects domains that accept everything (avoids false positives).

Built for senders

Plug into the way you already work.

Single email checks, drag-and-drop CSV uploads, and a clean REST API. Same engine, same results, your choice of interface.

●Real-time API. Verify on signup, on form submit, or as part of an ETL.
●CSV bulk uploads. Clean entire lists in seconds with live progress.
●Webhooks. Push results into your CRM or warehouse (coming soon).
●Verification history. Searchable, filterable, exportable.

# 1. Single verify, plain HTTP
curl -X POST https://api.surewyse.com/v1/verify \
  -H "Authorization: Bearer sw_live_..." \
  -d '{"email":"jane@example.com"}'

# Response
{
  "result":    "valid",
  "score":     96,
  "syntax_ok": true,
  "mx_found":  true,
  "smtp_valid":true
}

Pricing

Simple, predictable.

Start free. Scale when you're ready.

Free

$0/mo

100 verifications / month

✓ All six checks
✓ Single + bulk verify
✓ Web dashboard

Start free

Growth

$49/mo

25,000 verifications / month

✓ Everything in Free
✓ REST API
✓ Webhooks (beta)
✓ Priority support

Start growing

Scale

$149/mo

100,000 verifications / month

✓ Everything in Growth
✓ Volume discounts
✓ Dedicated SMTP IPs
✓ SLA

Get started

Frequently asked

Questions, answered.

Will Surewyse hurt my sender reputation? +

No. Verification probes use neutral mail-from identities, never your domain. Catch-all detection uses random local-parts.

How accurate is verification really? +

Across our test sets we hit 99%+ on definitive verdicts. The 1% sit in unknown (greylisting, server timeouts). We never guess.

Do you store the emails I verify? +

Yes. It lives in your account, so you can export history. You can purge it at any time.

Is there a free tier? +

Yes. 100 verifications per month forever, no card required.