Why Choose Bulk Email Checker
What is Bulk Email Checker?
A powerful web application that verifies if email addresses are real or fake. Perfect for anyone who sends emails regularly.
How Does It Work?
Every email passes through our 17+ factor verification test including RFC validation, duplicate filtering, and deep SMTP verification.
How Can I Verify Emails?
Upload CSV or text files for bulk verification, or integrate our REST API directly into your website or application.
Affordable Pricing
While competitors charge $0.01 per verification, we offer 10 verifications for the same penny. Clean 10,000 emails for just $9.95.
Bulk Email Verifier
Our bulk email verifier accepts CSV and tab-delimited file uploads containing thousands or even millions of email addresses. The bulk email verifier automatically removes duplicates, validates RFC-compliant syntax, and filters against our continuously updated database of thousands of disposable email providers. Previously failed addresses on your account blacklist are also filtered at no additional cost.
Every email address is processed through comprehensive validation that includes DNS and MX record checks, disposable detection, and deep SMTP verification. The system connects directly to destination mail servers to confirm that each mailbox exists and can receive mail, giving you the cleanest possible email list.
- Duplicate Email Remover: Removes repeated entries to keep your list unique
- Syntax Validator: Flags format errors and typos (like missing @ symbols)
- Disposable Email Checker: Blocks fake, burner, and temporary email services
- Role Account Filter: Detects generic B2B inboxes like admin@ and info@
- MX Record Checker: Checks for valid mail servers to prevent hard bounces
- CSV & Excel Support: Upload complex files and preserve all custom columns
- DNS Validity Check: Scrubs emails linked to unregistered or inactive sites
- Deep SMTP Ping: Direct server connection to verify a real inbox exists
- Blacklist Integration: Auto-filters your account's blacklisted addresses
- Free Blacklist Checks: Previously failed addresses process for free
- Catch-All Detector: Flags "accept-all" servers that hide invalid emails
- Anti-Greylisting: Bypasses temporary spam blocks to prevent false positives
Real-time Email Verification API
Invalid email addresses cost businesses thousands in lost conversions and damaged sender reputation. Studies show that up to 20% of email signups contain intentionally fake addresses, typos, misspellings and common errors like "hotmail.con", "gnail.com", and "yahoo.cmo" slip through standard form validation undetected.
Our Email Verification API validates email addresses in real-time at the point of entry. Integrating directly into your signup forms, checkout pages, or CRM systems to catch invalid emails before they ever reach your database.
Instant SMTP Verification
The Bulk Email Checker API performs comprehensive email validation including syntax checks, DNS/MX record verification, and deep SMTP mailbox verification that is measured in millseconds. Reduce confirmation email bounces drastically and protect your sender reputation from the start.
- Low-Latency Lookup: Sub-second response times optimized for signup forms
- Hard Bounce Blocker: Rejects invalid addresses before they enter your database
- Domain Spell Checker: Auto-suggests fixes for typos like gnail.com or yahoo.con
- Live SMTP Handshake: Pings the mail server in real-time to verify user existence
- Burner Email Guard: Automatically blocks disposable and temporary addresses
- RESTful JSON API: Compatible with Python, PHP, Node.js, and all major stacks
Unlimited Email Verification API
Scale your email verification with dedicated cloud infrastructure. The Unlimited Email Verification API uses a simple thread-based model where each thread represents a dedicated, concurrent connection that processes one verification at a time. Increase your thread count to verify more emails in parallel with truly unlimited monthly volume.
Ideal for real-time verification on signup forms, continuous list hygiene in your CRM, large batch jobs against data warehouses, or offering built-in email verification inside your own SaaS platform. All plans are month-to-month with no long-term contracts.
- Unlimited API Requests: Flat-rate pricing with zero monthly address caps
- High Concurrency: Scale 50+ parallel threads for maximum throughput
- Deep SMTP Handshake: The same enterprise-grade accuracy as our standard API
- Priority Support: Direct access to senior engineers for rapid troubleshooting
- Predictable Pricing: Verify millions of emails with zero overage fees
- No Long-Term Contracts: Flexible month-to-month billing, cancel anytime
Enterprise-Grade Data Security
Your data security is our highest priority. Bulk Email Checker implements enterprise-grade security protocols designed to protect your sensitive information at every layer. All data transmitted to our platform is secured using TLS 1.3 encryption with 256-bit AES, ensuring complete protection against interception during transit.
Client data is stored in isolated, encrypted containers with strict access controls. Our proprietary encryption architecture ensures that your email lists remain completely private and accessible only through your authenticated account. This zero-knowledge design means that not even Bulk Email Checker personnel can access your data, providing you with complete confidentiality and peace of mind.
- 256-bit SSL Encryption: All data transmission is encrypted with bank-level security
- Isolated Data: Your data is stored in independent containers
- Two-Way Encryption: Military-grade encryption methods for data at rest
- Zero Staff Access: Not even our team can view your email lists
- SOC 2 Type II Compliant: Independently audited security practices
- GDPR & CCPA Ready: Full compliance with privacy regulations
- HIPAA Ready: Compliant infrastructure for healthcare data requirements
Blacklist Monitoring
Automated Reputation Guard: seamless integrations with MailChimp, SendGrid, Mailgun, Postmark, and Mailjet allow you to synchronize your bounce data in real-time. Our system automatically captures hard bounces, spam complaints, and unsubscribes, instantly adding them to your master blacklist. This creates a permanent firewall that prevents toxic data from re-entering your lists and damaging your sender reputation.
Smart Credit Conservation: Maintain full control with an intuitive dashboard that allows you to manually whitelist addresses for re-engagement. To maximize your ROI, our intelligent cache "remembers" bad data if enabled and any email that has previously failed or been blacklisted is processed for free. You never waste credits verifying the same bad address twice.
- Simple ESP Integration: MailChimp, Mailjet, Mailgun, Mandrill, Postmark, SendGrid
- Auto-Blacklist Bounces: Blacklisted emails never make it back to your clean lists
- Reputation Signals: Auto-syncs spam complaints and unsubscribes to protect your reputation
- Easy Removal: Unblacklist addresses from your control panel
- Never Pay Twice: Previously failed addresses don't consume credits
- Email Blacklist Check: Screens every email against your account's historical bounce data
Google Sheets Integration
If you use Google Sheets to manage your spreadsheets, you can easily integrate Bulk Email Checker in a few quick steps. Our REST API offers an XML response when requested which allows you to verify email addresses directly from within your spreadsheet on Google Sheets. No need to export your data, verify emails right where you work.
- Google Apps Script Ready: Native compatibility for custom spreadsheet functions
- IMPORTXML Optimized: Lightweight XML structure designed for sheet formulas
- JSON & XML Support: Flexible parsing options for any data environment
- Bulk List Scrubber: Clean thousands of rows automatically without timeouts
- In-Cell Validation: Results populate directly next to your email data
- Copy-Paste Setup: Simple installation with zero complex coding required
WordPress Plugin
The Bulk Email Checker WordPress Plugin adds real-time email verification to your comment forms, user registration, and contact forms. Install and configure in minutes with no coding required. The plugin validates every email address at the point of entry, blocking spam signups and ensuring you capture accurate contact information from real visitors.
Compatible with all major WordPress form builders including Contact Form 7, Gravity Forms, WPForms, and Ninja Forms. When a visitor enters an invalid or disposable email address, they receive an instant notification to correct their entry before submission. Stop losing leads to typos and fake emails.
- 2-Minute Installation: Seamless setup with no coding required
- Comment Form Protection: Block spam comments with invalid emails
- User Registration Validation: Verify emails during account creation
- Contact Form Integration: Works with Contact Form 7, Gravity Forms, WPForms
- Real-time User Alerts: Notify users of invalid email before submission
- Block Disposable Emails: Stop fake signups from temporary addresses
- Never Lose a Lead: Catch typos at the point of contact
Microsoft Excel Integration
Power users who rely on Microsoft Excel can leverage our WEBSERVICE function integration to verify email addresses directly within their spreadsheets. Our REST API returns XML responses that Excel can parse natively, allowing you to build powerful email validation workflows without leaving your familiar Excel environment.
Whether you're using Excel 2016, Excel 365, or Excel Online, you can set up email verification formulas that automatically validate addresses in real-time. Perfect for data analysts, marketers, and sales teams who manage large contact lists in Excel.
- Office 365 Compatible: Native support for Excel 2019, 2021, and Office 365
- WEBSERVICE Function: Built specifically for the native =WEBSERVICE() API formula
- FILTERXML Parsing: Auto-extract data using standard XML filtering functions
- Drag to Verify: Scrub thousands of emails by simply dragging the formula
- Excel Web Support: Fully functional in browser-based Office 365 spreadsheets
- No VBA Macros Needed: 100% formula-based solution safe for corporate firewalls
MX Record Lookup
Go beyond simple email validation. Our API returns comprehensive mail server intelligence with every verification, giving you deep insights into the recipient's email infrastructure. Understand where emails are hosted, which ISP manages their mail servers, and the geographic location of their infrastructure.
Perfect for lead enrichment, fraud prevention, geographic targeting, and compliance workflows. All enrichment data is included free with every API request, no additional cost or separate API calls required.
- MX Fingerprint: Extract the MX Hostname and IP address
- Server Geolocation: Pinpoint exact locations by Country, City, and Lat/Long
- Provider Detection: Instantly identify G Suite, Office 365, Zoho, and cloud hosts
- ASN Network Data: Reveal the Autonomous System Number and Owner Name
- Full MX Hierarchy: View the complete chain of priority levels and backup servers
- Data Residency Check: Confirm if the mail server is in a GDPR-compliant region
Frequently Asked Questions
Everything you need to know about email verification
Email verification is the process of confirming whether an email address is valid, deliverable, and belongs to a real mailbox. It protects your sender reputation by preventing bounces, reduces wasted marketing spend on invalid addresses, improves email deliverability rates, and helps maintain compliance with anti-spam regulations. Businesses typically see a 20-40% improvement in campaign performance after cleaning their email lists.
Bulk Email Checker achieves 99.7% accuracy through our comprehensive 17+ factor verification process. We perform deep SMTP mailbox verification, DNS/MX record validation, syntax checks, disposable email detection, role-based email filtering, and catch-all domain identification. Our system connects directly to mail servers to verify mailbox existence in real-time, ensuring the highest possible accuracy rates in the industry.
Bulk Email Checker supports CSV and TXT file imports for bulk email verification. Our REST API integrates with any programming language or platform, and we offer select native plugins for popular systems. For developers, we provide comprehensive API documentation with code examples in PHP, Python, JavaScript, Ruby, and more. You can also integrate directly with Google Sheets and Microsoft Excel for seamless email list cleaning workflows.
Absolutely. We implement enterprise-grade security including TLS 1.3 encryption with 256-bit AES for all data transmission, isolated encrypted containers for each client's data, and a zero-knowledge architecture that prevents even our staff from accessing your email lists. We are SOC 2 Type II compliant, ISO 27001 certified, GDPR ready, CCPA compliant, and HIPAA ready. Your data is automatically purged from our servers after processing unless you explicitly choose to retain it.
Pay-as-you-go pricing is ideal for one-time list cleaning or occasional verification needs. You can purchase credit packages (starting at $9.95 for 10,000 verifications) with no expiration, perfect for batch jobs and general list hygiene. For continuous, high-volume needs, the Unlimited API offers a monthly subscription with unlimited verifications and dedicated concurrent threads. Choose Pay-As-You-Go for manual uploads, or the Unlimited API for real-time validation integrated into your busy signup forms, CRM, or high-volume SaaS platforms.
A Hard Bounce indicates a permanent error, meaning the email address does not exist, the domain is invalid, or the recipient server has blocked delivery. You should remove these immediately. A Soft Bounce is a temporary issue, often caused by a full mailbox, server downtime, or a message that is too large. Our system identifies both, allowing you to clean hard bounces while retaining valid contacts that may just be temporarily unavailable.
A "Catch-All" server is configured to accept all emails sent to a specific domain, regardless of whether the specific mailbox exists. For example, if you send an email to random-name@company.com, the server will accept it rather than bouncing it back. These are risky for marketers because they can skew deliverability metrics. Bulk Email Checker identifies these domains so you can decide whether to segment them or verify them further.
Yes. Spam traps are secret email addresses created by Internet Service Providers (ISPs) and anti-spam organizations to catch senders with poor list hygiene. They do not belong to real people. Sending to a spam trap can severely damage your sender reputation or get your domain blacklisted. Our system cross-references your list against a massive database of known spam traps and honeypots to remove these toxic threats.
Disposable emails (also known as "burner" or "temporary" emails) are short-term addresses created by users to bypass registration forms without providing their real contact info. Services like 10MinuteMail or Mailinator provide these. They are low-value for marketers because they self-destruct after a short time. We automatically detect and flag these domains so you can block fake signups and keep your database high-quality.
Absolutely. Email service providers (like Gmail and Outlook) calculate your "Sender Reputation" based on how many of your emails bounce. If you have a high bounce rate (above 2%), they may send your future emails, even valid ones, straight to the Spam folder. By removing invalid addresses, you ensure your emails hit the Primary Inbox, which directly increases your Open Rates, Click-Through Rates (CTR), and overall Marketing ROI.
Simple, Transparent, Pay As You Go Pricing
No subscriptions, no contracts. Just pay for what you need.