email checker
that goes deeper
Check if any email address is valid, deliverable, and safe to send to. Our email checker connects directly to mail servers for real verification, not just regex patterns.
What our email checker catches
Bad emails destroy deliverability. Our email checker identifies problems before they reach your mailing list.
Invalid emails
Emails with typos, non-existent domains, or mailboxes that don't exist bounce and hurt your sender reputation.
Disposable emails
Temporary email addresses from services like Mailinator or Guerrilla Mail are used for spam signups and fake accounts.
Role-based emails
Addresses like info@, admin@, or support@ often go to shared inboxes and have higher complaint rates.
Email checker results explained
Mailbox verified. Safe to send.
Catch-all or unverifiable domain.
Mailbox does not exist. Do not send.
Live API Playground
Test the API with real validation. Every request hits our live infrastructure.
-H "Authorization: Bearer vk_live_..." \
-d '{"email":"dev@company.com"}'
Enter an email and validate to see results
$ ./validate --email user@example.com
How the email checker works
Every email check runs through a multi-layer verification pipeline.
Syntax & format check
Validates email format against RFC 5322. Catches typos, missing @ signs, invalid characters, and malformed domains.
DNS & MX record lookup
Queries domain DNS records to confirm the domain exists and has mail exchange (MX) servers configured to receive email.
Reputation & pattern analysis
Checks against 100,000+ known disposable email providers. Identifies role-based addresses and free email providers.
SMTP mailbox verification
Connects to the recipient's SMTP server and checks if the specific mailbox exists. Detects catch-all domains and full inboxes.
Score & grade
Combines all signals into a 0.0-1.0 deliverability score and assigns a quality grade: excellent, good, fair, or poor.
Simple pricing
No hidden fees. No enterprise sales calls. Just pay for what you use.
Try it risk-free for 14 days. Full refund if it's not for you.
Starter
- • 5,000 validations/month
- • single API key
- • real SMTP verification
- • validation history
Growth
- • 15,000 validations/month
- • single API key
- • real SMTP verification
- • validation history
- • bulk validation
- • email OTP 2FA (25k/mo)
Pro
- • 50,000 validations/month
- • unlimited API keys
- • duplicate removal
- • webhooks & callbacks
- • email OTP 2FA (50k/mo)
Unlimited
- • unlimited validations
- • all pro features
- • dedicated support
- • fair usage up to 5M/month
- • email OTP 2FA (100k/mo)
Email checker FAQ
What does the email checker actually check?
Our email checker runs 5 layers of verification: syntax validation, DNS/MX lookup, disposable email detection, role-based address identification, and SMTP mailbox verification. Each email gets a deliverability score and quality grade.
How is this different from a simple regex email checker?
Regex only checks email format (syntax). Our email checker goes further by verifying DNS records, checking if the domain has mail servers, and connecting via SMTP to confirm the mailbox exists. This is the difference between 85% and 97%+ accuracy.
Can I check emails in bulk?
Yes. Bulk email checking is available on the Growth plan ($19/mo) and above. Upload CSV or Excel files to check thousands of emails at once. Results include downloadable reports.
How fast is the email checker?
Basic checks (syntax + MX) complete in ~100ms. Full SMTP verification takes 300-500ms on average. Our infrastructure runs on edge computing for consistent low-latency responses worldwide.
Does the email checker send emails to the address?
No. We never send emails to the checked address. SMTP verification works by initiating a connection to the mail server and checking if the mailbox exists without actually delivering a message.
Start checking emails today
Try the email checker above or get an API key for programmatic access.