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Pay as you grow • From $0.0002 per validation
Email Validation Tool
Validate 11.5× more catch-all emails than MillionVerifier
without sending any emails
trusted by
+ many more in sales, marketing & recruitment
trusted by+ many more in sales, marketing & recruitment
Instant email verification*
Check the mailbox exists*
*even catch-alls
No monthly subscription
Bulk CSV processing
API access
trusted by+ many more in sales, marketing & recruitment
Instant email verification*
Check the mailbox exists*
*even catch-alls
No monthly subscription
Bulk CSV processing
API access
Give it a go. Validate an email address!
Free email validation tool • Verify email addresses instantly
How Email Validation Works
Our email validator checks email syntax, verifies domain validity, confirms MX records exist, and tests mailbox deliverability. We can validate catch-all email addresses that other email verification tools mark as risky or unknown. Check if an email address is valid before sending to improve email deliverability and avoid bounces.
Email Validation Features
- Real-time email address verification
- Syntax validation and typo detection
- Domain and MX record checking
- Mailbox existence verification
- Industry-leading catch-all resolution
- Free email validation with no signup required
Stop Discarding Valuable Prospects
Traditional validators discard contacts you could be reaching.
Catch-all domains accept all email addresses to prevent spam. Traditional validators can't verify if these addresses exist, so they mark them 'risky' and recommend discarding them—losing you valuable prospects.
More validated emails→More prospects reached→More opportunities→More closed deals
Your prospect list
Traditional Validators
Your Email List.csv
Invalid
Catch-all
DISCARDED
Valid
Traditional validation approach
Smaller pool of reachable contacts
OrbiSearch
Your Email List.csv
Invalid
Includes invalid catch-alls
Catch-all (risky)
Valid
Includes validated catch-alls
$
Larger pool of reachable contacts
More validated contacts to reach
Same list. More reach.
Competitors discard contacts you could be reaching. Validate more, sell more.
Why other validators fail at catch-alls
And how we solve it differently
Email Sending Approach
Their Approach: Send actual emails
- • Sends actual emails to see if they will bounce
- • Ethically questionable practice
- • Unnecessary when better technology exists
- • Less accurate than direct verification
Our Approach: Never send emails
- • Verify mailbox existence without sending anything
- • 100% ethical verification
- • More accurate than sending actual emails
- • Doesn't hassle prospects
Detection Method
Their Approach: Check for absence of bounce
- • Wait to see if email doesn't bounce back
- • Many servers don't send bounce notifications
- • No bounce ≠ email exists (false positives)
- • Checking for absence, not presence
Our Approach: Check for presence of mailbox
- • Directly detect if mailbox exists
- • Actual verification, not guessing
- • Confirms presence, not absence
- • Zero false positives guarantee
Speed & Integration
Their Approach: Wait 48-72 hours
- • Must wait days for bounce window
- • Cannot offer real-time API
- • Leads go cold while waiting
- • Blocks workflow automation
Our Approach: Instant results
- • Immediate verification in seconds
- • Real-time API for integrations
- • Act on leads while they're hot
- • Seamless workflow automation
Dual-Layer Verification: How we validate catch-alls instantly
We combine SMTP validation with account detection
Email Input
Layer 1
SMTP
Standard Check
+
Layer 2
Detection
Secret Sauce
Verified
Zero False Positives Guarantee
We never mark fake emails as real. If we say it exists, it exists.
We tested 2,451 confirmed catch-all emails
Here's what percentage each validator resolved:
OrbiSearch
54%NEW
✓ Instant results
ZeroBounce34%
NeverBounce31%
MillionVerifier5%
Scrubby*N/A
Sends emails - leads to high false positives
Test conducted October 2025 on 2,451 confirmed catch-all email addresses from real cold outreach campaign
*Scrubby uses a different method: sends actual emails to check for bounces (not comparable)
Speed Comparison: 10 Minutes vs 3 Days
10,000 emails validated in under 10 minutes vs 48-72 hour wait
OrbiSearch
< 10 mins
for 10,000 emails
- 1,000+ emails per minute
- Start outreach immediately
- Instant CSV export
- Real-time API responses
Email-Sending Validators
48-72 hrs
for 10,000 emails
- Send emails & wait for bounces
- 3 days minimum wait
- Leads go cold waiting
- High false positive rate
See exactly how we validate more catch-alls
Three-step verification process with zero false positives
1
SMTP Validation Layer
- Connects directly to the mail server using SMTP protocol
- Verifies MX records and server configuration
- Identifies catch-all server configurations
- Checks if the mailbox exists
Note: This is where most validators stop. We're just getting started.
2
Account Detection Layer
- Our secret sauce
- Directly checks whether the mailbox exists
- Works on most catch-all domains
- No emails sent
Note: We've solved the catch-all problem that stumps traditional validators.
3
Zero False Positives Guarantee
- Checks in real-time whether email exists
- No cached results
- Continuous learning from validation feedback
- 100% money-back guarantee on false positives
Note: If we say an email exists, you can trust it 100%.
Everything you need for email validation
Comprehensive features designed for sales, marketing, and recruitment teams
Instant Verification
No waiting, immediate results for all email types including catch-alls
- • Real-time validation
- • No queues or delays
- • Instant API responses
Mailbox Existence
Not just deliverable, but verifies the mailbox actually exists
- • Checks beyond bounce status
- • Validates actual mailbox
- • Zero false positives
Pay Per Use
No monthly commitments, scale up or down as needed
- • Only pay for what you use
- • No subscription required
- • Flexible scaling
Bulk CSV Processing
Upload CSV files and get results in seconds, not hours
- • Process thousands at once
- • Automatic deduplication
- • Export validated results
API Access
RESTful API with simple integration for your workflows
- • Easy integration
- • Comprehensive docs
- • Real-time responses
Catch-all Specialist
Industry-leading catch-all validation—up to 11.5× better than competitors
- • Dual-layer verification
- • Instant results
- • Better than traditional solutions
Frequently Asked Questions
Get answers to common questions about our email validation technology
What is email validation?
Email validation is the process of verifying that an email address exists, is deliverable, and can receive messages. It checks syntax, domain validity, and mailbox existence without sending any actual emails, helping you maintain clean email lists and high deliverability rates.
How does email validation work?
Email validation works through multiple steps: First, it checks the email syntax for proper formatting. Second, it verifies the domain exists and has valid MX records. Third, it connects to the mail server via SMTP to verify the mailbox exists. OrbiSearch adds a fourth layer with proprietary catch-all resolution technology.
What are catch-alls?
Catch-all domains (also called accept-all or wildcard domains) are configured to accept emails sent to any address at that domain, even if the specific mailbox doesn't exist. They accept everything to prevent spammers from discovering valid addresses, representing a significant portion of business email addresses.
What are some other names for catch-alls?
Catch-all email addresses are also known as: accept-all emails, wildcard email aliases, default addresses, or unverifiable emails. All these terms describe domains that accept mail to any address, whether it exists or not.
Why should I care about catch-alls?
Catch-alls represent a significant portion of B2B email lists. Traditional validators can't verify these addresses, forcing you to discard valuable prospects. OrbiSearch validates up to 11.5× more catch-alls than competitors, dramatically expanding your reachable audience.
How does catch-all email verification work?
OrbiSearch uses dual-layer verification: First, standard SMTP validation identifies the domain as catch-all. Then, our proprietary detection layer uses advanced techniques to verify if the specific mailbox actually exists, without sending any emails. This achieves industry-leading catch-all validation with zero false positives.
Can you verify greylisted catch-all emails?
Yes. Many domains use both greylisting (temporary delays) and catch-all configurations together. While most validators handle greylisting alone, the combination of greylisting + catch-all is extremely difficult to resolve. OrbiSearch can verify these challenging cases that other validators mark as 'unknown'.
Can you verify all catch-alls?
We can verify significantly more catch-all email addresses than competitors. Some domains have exceptionally restrictive security that prevents any form of verification by any validator. If we determine there is a chance the mailbox could exist, we mark these as 'risky' so you can decide how to handle them.
How accurate is OrbiSearch's catch-all resolution?
OrbiSearch validates up to 11.5× more catch-alls than competitors with a zero false positives guarantee. If we say an email exists, it exists. We deliver instant results compared to email-sending validators that take 48-72 hours.
What makes OrbiSearch different from other email validators?
OrbiSearch validates significantly more catch-all emails than competitors without sending any messages. While others mark catch-alls as 'risky' or send actual emails and wait days for bounces, we use proprietary technology to verify mailbox existence in real-time—validating up to 11.5× more than MillionVerifier.
How many free validations does OrbiSearch give me?
You get 100 free credits when you sign up, which equals 500 email validations. No credit card required. This lets you test our catch-all resolution capabilities and see the difference in your validation results immediately.
Does OrbiSearch store or share email addresses?
No. We process all validations in real-time and don't maintain databases of email addresses. Your data is never stored, shared, or sold. We're fully GDPR and CCPA compliant, ensuring complete privacy and security for your email lists.
How fast is the OrbiSearch email validation process?
OrbiSearch validates emails instantly - under 10 minutes for 10,000 emails (1,000+ per minute). Single validations complete in under 2 seconds. Unlike email-sending validators that take 48-72 hours, you get results immediately and can start your outreach while leads are hot.
Can I validate emails in bulk via the OrbiSearch API?
Yes, our RESTful API supports bulk validation with CSV upload, webhook callbacks, and real-time streaming results. Process thousands of emails per minute with simple integration. Full documentation and code examples available for seamless implementation into your existing workflows.
Why is it bad to skip email verification before cold outreach?
Skipping verification destroys your sender reputation. Sending to invalid emails causes hard bounces (>5% gets you blacklisted), while unverified emails lead to spam complaints. Once your domain is blacklisted or has poor reputation, all your emails - even to valid addresses - go to spam. Recovery takes months of careful reputation rebuilding.
What happens if I email unverified catch-all addresses?
It's a gamble that damages your entire outreach. Many catch-all addresses don't actually exist, leading to high bounce rates. This triggers spam filters, ruins your sender reputation, and gets your domain blacklisted. OrbiSearch validates significantly more catch-alls than competitors, reducing this risk.
What's the impact of emailing invalid addresses?
Invalid emails cause hard bounces that immediately damage your sender reputation. Just 1-2% hard bounce rate triggers spam filters, while 5% can get you blacklisted. Each bounce signals to ESPs that you're using poor quality lists, causing even your valid emails to land in spam. This creates a death spiral for your cold outreach efforts.
What's the difference between hard and soft bounces?
Hard bounces are permanent failures (invalid email, domain doesn't exist) that damage your reputation immediately - these addresses must be removed instantly. Soft bounces are temporary issues (full inbox, server down) that might resolve themselves. For cold outreach, hard bounces above 1% and soft bounces above 5% will tank your deliverability and get you flagged as spam.