--- title: "Email Verification Features & Deliverability Engine | Bouncify" description: "Explore Bouncify's 9-stage email verification features. Anti-greylisting, SMTP handshakes, syntax checks & API. Credits never expire. Get 100 free checks." canonical: "https://bouncify.io/features.html" last_updated: "2026-09-18" schema_types: ["SoftwareApplication","FAQPage","BreadcrumbList"] --- ✦ 99%+ Accuracy Deliverability Platform # Email Verification Features Built for 99%+ Inbox Placement Eliminate hard bounces, shield sender reputation, and verify contact lists at scale. Bouncify delivers advanced **email verification features**—including bulk email verification, email list cleaning, and deep email list validation—with credits that never expire. [Claim 100 Free Credits](https://app.bouncify.io/register) [Developer API Specs](/email-validation-api.html) - 100 Free Credits - No Credit Card Required - Setup in 60s ### Clean Verified List (Final) ###### Trade Corp IND (106723).csv Feb 04 ANALYSIS [RESULT](https://app.bouncify.io/register) Emails 106,018 - Deliverable 87,967 82.98% - Undeliverable 6,491 6.12% - Catch-all 8,725 8.23% - Unknown 2,835 2.67% Verified 100% ### Free Quality Analysis (Pre-Check) ###### cle.csv Mar 20 RESULT [VERIFY](https://app.bouncify.io/register) Emails 5,956 - • Common ISP 2,542 42.68% - • Role Based 601 10.09% - • Disposable 0 0% - • Syntax Error 14 0.24% - • Spamtrap 14 0.24% Analyzed Free Preview ### 1.9 Billion+ Emails Verified ### 99%+ Deliverability Accuracy ### 10,000+ Active Businesses ### 99.99% API Uptime SLA ##### The Bouncify Moat ## Why High-Volume Senders Choose Bouncify Over Legacy Verifiers Enterprise deliverability should not come with expiring credits or complex pricing. Bouncify pairs military-grade hygiene algorithms with developer-friendly economics. ### Credits Never Expire Unlike ZeroBounce and NeverBounce which forfeit your unused balance every 30 days, Bouncify credits stay in your wallet indefinitely. Purchase once, verify anytime. ### Upto 75% Lower Cost Pay as low as $0.00059 per email without sacrificing depth. Get enterprise-grade list scrubbing and API access starting at just $12 for 3,000 credits. ### Anti-Greylisting Engine Most tools dump temporarily deferred B2B servers into an "Unknown" bucket. Our RFC-compliant retry engine resolves up to 20% of unknown addresses into usable leads. ### Unified Credit Balance One balance powers everything. Seamlessly split credits between bulk CSV drag-and-drop cleaning, CRM sync connectors, and sub-100ms real-time REST API verification. ##### Algorithmic Pipeline ## 9 Multi-Layered Email List Hygiene & Verification Checks Every contact is evaluated by our [email list verifier](/email-list-verifier.html) and [list scrubbing service](/list-scrubbing-service.html) across 9 rigorous validation stages to ensure 99%+ deliverability without transmitting an actual email message. ### 01\. Syntax & Typo Detection Validates RFC 5321 and 5322 compliance. Identifies misplaced @ symbols, illegal characters, domain typos, and faulty formatting. ### 02\. DNS & MX Validation Interrogates DNS zone records to verify mail exchanger existence, DNS health, and fallback servers to filter inactive domains. ### 03\. Deep SMTP Handshake Establishes real-time connection with recipient mail servers to confirm mailbox existence without sending a message. ### 04\. Anti-Greylisting Engine Applies intelligent wait-and-retry timing on 4xx greylisting deferrals to turn temporary "unknowns" into definitive deliverable leads. ### 05\. Spam Trap & Honeypot Removal Flags recycled spam traps and honeypots maintained by major blocklists (Spamhaus, Barracuda) to shield your sender reputation. ### 06\. Disposable Email Filtering Screens against 3,500+ throwaway and burner domains (Mailinator, 10MinuteMail) to protect CRM pipelines from fake signups. ### 07\. Catch-All Domain Resolution Detects accept-all mail servers and calculates deliverability confidence scores so you can tailor your sending risk threshold. ### 08\. Automated Deduplication Identifies and clears duplicate contacts upon upload for free, ensuring you never waste verification credits or send duplicates. ### 09\. Free List Quality Analysis Preview list health distributions, syntax errors, and disposable percentages completely free before spending paid credits. #### Simple Workflow ## Clean Your Database in 3 Simple Steps No complex configuration. Upload your list and let our distributed cloud engine handle [bulk email verification](/bulk-email-verification.html) at enterprise speed. - Step 1 ###### Upload Your Contact List Drop your CSV file or copy-paste contacts into our secure dashboard, or import directly from HubSpot, Mailchimp, or Google Sheets. - Step 2 ###### Automated 9-Point Verification Our [email list validation](/email-list-validation.html) engine executes 9 algorithmic checks including DNS health, SMTP handshakes, spam trap analysis, and disposable detection. - Step 3 ###### Download Safe Contacts Export pristine, deliverable leads ready for sending. Achieve industry-leading delivery accuracy with verified safe contacts. Sub-100ms REST API ## Point-of-Capture Email Validation for Developers Validate user registrations and lead capture forms in real time. Block fake accounts and disposable emails before they reach your database. - Average response time < 100 milliseconds - 120+ requests/min standard rate limit (enterprise bursting supported) - Ready code samples for cURL, Node.js, Python, and PHP [Explore API Documentation](/email-validation-api.html) POST https://api.bouncify.io/v1/verify 200 OK ``` { "result": "deliverable", "message": "This address can receive emails.", "email": "support@bouncify.io", "user": "support", "domain": "bouncify.io", "accept_all": false, "role": true, "disposable": false, "spamtrap": false, "success": true } ``` #### Enterprise-Grade Infrastructure ## Enterprise Security & Data Privacy by Default Your email lists are strictly confidential. Bouncify is engineered with zero-compromise security controls and full compliance with global regulations. ### GDPR & CCPA We process data strictly under EU and California privacy standards with zero long-term retention. ### 256-Bit SSL/TLS Data is encrypted in transit (TLS 1.3) and at rest (AES-256) at every layer of the verification stack. ### Auto 30-Day Purge Uploaded contact lists and export results are automatically and permanently deleted after 30 days. ### Zero Message Storage We ping MTAs via non-intrusive SMTP handshakes without reading or storing recipient email contents. #### Seamless Connectivity ## Clean Lists Directly Inside Your Marketing Tools Connect Bouncify with your ESP or CRM to scrub contacts automatically without manual CSV uploads. [View All Integrations](/integrations.html) - ![HubSpot](/assets/img/integrations/hubspot.svg) ###### HubSpot - ![Mailchimp](/assets/img/integrations/mailchimp.svg) ###### Mailchimp - ![Zapier](/assets/img/integrations/zapier.svg) ###### Zapier - ![Salesforce](/assets/img/integrations/salesforce.png) ###### Salesforce - ![Google Sheets](/assets/img/integrations/google-sheets.png) ###### Google Sheets - ![ActiveCampaign](/assets/img/integrations/active_campaign.svg) ###### ActiveCampaign - ![Klaviyo](/assets/img/integrations/klaviyo.png) ###### Klaviyo - ![Brevo](/assets/img/integrations/sendinblue.svg) ###### Brevo - ![Zoho CRM](/assets/img/integrations/zoho-crm.svg) ###### Zoho CRM - ![MailerLite](/assets/img/integrations/mailer_lite.svg) ###### MailerLite - ![GetResponse](/assets/img/integrations/getresponse.svg) ###### GetResponse - ![AWeber](/assets/img/integrations/aweber.svg) ###### AWeber - ![Campaign Monitor](/assets/img/integrations/campaign-monitor.png) ###### Campaign Monitor - ![ConvertKit](/assets/img/integrations/convertkit.png) ###### ConvertKit - ![Constant Contact](/assets/img/integrations/constant_contact.svg) ###### Constant Contact - ![Drip](/assets/img/integrations/drip.svg) ###### Drip - ![Intercom](/assets/img/integrations/intercom.svg) ###### Intercom - ![Dropbox](/assets/img/integrations/dropbox.svg) ###### Dropbox #### Got Questions? ## Frequently Asked Questions About Verification Features Answers to common technical and deliverability questions from email marketers and developers. ##### What are the essential email verification features needed to prevent bounces? A reliable verification service must provide multi-stage validation: RFC syntax checking, DNS/MX record verification, real-time SMTP handshakes, disposable burner filtering, spam trap removal, catch-all resolution, and anti-greylisting. Bouncify executes all 9 checks for [email list verification](/email-list-verification.html) on every uploaded list or API request to achieve 99%+ deliverability. ##### How does Bouncify's anti-greylisting feature work? Greylisting is an anti-spam tactic where mail servers temporarily reject initial connections with 4xx deferral responses. Rather than prematurely classifying these servers as "Unknown" or "Invalid", Bouncify's anti-greylisting engine automatically waits and retries the connection according to RFC standards, converting up to 20% of deferred addresses into verified deliverable leads. ##### What is a catch-all email and how does Bouncify handle accept-all domains? A catch-all (accept-all) domain is configured by a system administrator to accept emails sent to any address at that domain, even if the specific recipient does not exist. Bouncify detects accept-all configurations and provides granular sub-status data so you can segment catch-alls separately from verified deliverable contacts to protect your sender reputation. ##### Do Bouncify email verification credits ever expire? No. Bouncify operates on an industry-leading no-expiration policy for all pay-as-you-go credit packages. Once purchased, your verification credits remain in your account indefinitely until used. You never forfeit paid credits at the end of the month. ##### How fast is the Bouncify email validation API? Bouncify's REST API delivers sub-100 millisecond response times on average. It is optimized for real-time validation on user registration forms, e-commerce checkout funnels, and lead generation pages to reject invalid or temporary email addresses instantly before form submission completes. ##### Can I test Bouncify's verification features for free? Yes. Every new account receives 100 free verification credits immediately upon registration—no credit card required. You can test both the [email list cleaning](/email-list-cleaning.html) dashboard and the real-time REST API with full feature access. #### Let's Try! 100 Free Credits ## Ready to Stop Bounces and Maximize Deliverability? Join 10,000+ businesses and developers protecting their sender reputation with Bouncify. [Claim 100 Free Credits](https://app.bouncify.io/register) - 100 Free Verification Credits - No Credit Card Required - Credits Never Expire - 99%+ Verified Accuracy