Claude Desktop
Validate mid-conversation
BounceProtect
Clean your email lists before you send
Email validation · Deep Analysis · 22M+ company records
Know why your list fails — before you send
Every email gets real-time SMTP mailbox verification, deliverability score, spam risk score, and send recommendation. Run Deep Analysis to check domain legitimacy and match against 22M+ verified companies. Know the email, the company, and whether to send — before you hit send.
No credit card required · 100 free validations on signup
Spam filter risk scoreSMTP mailbox verificationSend recommendationDeep AnalysisQuick Check22M+ company databaseDomain intelligenceDomain typo correctionSPF & DMARC signalsREST API
Example output — see what we detect
sarah@acmecorp.com
MX records found · SPF + DMARC configured
SMTP: Verified ✓✓ SendSpam risk: Low (88)
hello@tempmail.io
Throwaway email provider — score: 5
✗ Don't sendDisposable domain
sales@gmial.com
Possible domain typo detected
○ ReviewDomain typo → gmail.com?
info@newstartup.io
Domain registered < 90 days · Spam risk: 35
⚠ CautionNo DMARC · New domain
sarah@shopify.com
BP Org match · Founded 2006 · Canada · LinkedIn →
✓ SendDeep Analysis: Software · 10k+ employees
Try it live below ↓
Check an email instantly
Validate a single email address and see every risk signal detected.
Validation limit
Create a free account to validate more emails.
10+
signals including live SMTP
22M+
company records
9
Zapier actions & triggers
100
free credits on signup
Integrations
Works with the tools your team already uses
Validate lists before syncing records to your CRM, enrichment workflows, or campaign platform.
MCP + Zapier
Works inside Claude, Cursor, Claude Code — and Zapier
Validate emails without leaving your AI assistant. The BounceProtect MCP server connects directly to Claude, Cursor, and Claude Code. Or automate any workflow with our native Zapier integration — 6 actions, 2 searches, and a trigger, ready to use.
Cursor
Clean lists while you code
Claude Code
Integrate into any workflow
Why BounceProtect
Other tools give you a score. We give you the reason.
A score tells you something is wrong. An explanation tells you what to do about it.
Other validators
sales@gmial.com
Score: 0.3Risky
noreply@brand.com
Score: 0.5Risky
hello@tempmail.io
Score: 0.1Invalid
You know something is wrong. You don't know what.
BounceProtect
sales@gmial.comRisky
domain typo○ ReviewDomain typo — did you mean gmail.com?
noreply@brand.comRisky
role account✗ Don't sendRole-based address — shared inbox, rarely converts
info@newco.ioRisky
smtp verified⚠ CautionSMTP verified, but no DMARC and new domain — spam risk score: 35
You know exactly what is wrong. And what to do about it.
Customer results
Trusted by teams who send at scale
8% → 2% bounce rate
“The send recommendation means the VA running our list cleaning doesn't need to make judgment calls. The tool makes the call and they execute on it.”
DS
Divjot S. Mehton
CEO, AquiferGrowth
7% → 1% bounce rate
“The deep domain analysis was a bonus we didn't expect to use as much as we do. Seeing which companies actually have a functioning website helps when deciding who to call versus who to email.”
HR
Han Ryoo
Head of Product, Freight Right
Features
Built for teams that care about deliverability
Multi-signal risk engine
Real-time SMTP mailbox verification confirms whether the mailbox actually exists — then adds disposable domain, role account, catch-all, new domain, and SPF/DMARC signals. Every reason explained in plain English.
Spam filter risk score
A 0–100 score that tells you how likely your emails are to hit spam filters — not just whether they'll bounce. Factors in SPF, DMARC, domain age, and provider signals.
Domain intelligence
Real-time SMTP mailbox verification, MX provider detection, catch-all confidence scoring, domain age, parked domain detection, and SPF/DMARC authentication checks — all per domain, not just per email.
Send recommendation
Every email gets an actionable verdict: SEND, SEND WITH CAUTION, REVIEW, or DO NOT SEND. No interpretation required — just act on it.
Domain typo correction
Catches gmial.com, yaho.com, hotmai.com and dozens more. Suggests the correct domain so you can fix lists before they bounce, including cross-referencing against other domains in your list.
Deep Analysis
Run a background domain sweep on every unique domain in your list — website presence, SSL, domain age, safe browsing, parked domain detection, mail provider, and BP Org matching against 22M+ companies.
Blacklist Monitor
Check your sending domain against Spamhaus DBL, Barracuda, SURBL, and NordSpam instantly. Know if you are blacklisted before your next campaign goes out — free on every plan, no per-check fees ever.
Company intelligence
Match any business email to company name, industry, employee count, LinkedIn profile, and location — backed by 22M+ verified companies across 100+ countries. Powered by BP Organizations.
Enriched CSV export + API
Export with status, risk signals, deliverability score, spam score, send recommendation, and domain corrections. Or integrate directly via REST API with PHP, Node.js, and Python examples.