Live SMTP verification

    Check if an email address
    can actually receive mail

    VeriMailX works as a free email checker and email validator: it tests syntax, MX records, live SMTP response, plus catch-all, disposable and role-account signals, then returns one actionable verdict. No email sent to the recipient.

    No email sent to the recipient
    Live SMTP verification
    Single checks and bulk lists
    free email verifier

    Try it now

    5 free checks per day — no signup required.

    5 of 5 free checks left today — no signup required.

    Need more than one address? Use the bulk email checker.

    How it works

    Every email travels through a four-stage pipeline

    Watch a single address get stamped clean at each checkpoint — the same pipeline runs on every one of the millions we verify each day.

    Syntax check
    stage 1 / 4
    MX record lookup
    stage 2 / 4
    SMTP handshake
    stage 3 / 4
    Deliverability score
    stage 4 / 4
    Single & bulk
    Email lists
    4 stages
    Verification pipeline
    No email sent
    SMTP check
    API & CSV
    Integrations
    Why VeriMailX

    Everything You Need for A Cleaner Email List

    Every address is tested for syntax, MX records and the live SMTP response, then scored against catch-all, disposable and role-account signals — so you get one actionable verdict instead of raw server output.

    Multi-step verification

    Syntax, MX, SMTP and risk signals combined into one actionable verdict.

    Real-Time & Bulk

    Verify a single address with live SMTP checks, or upload a CSV for asynchronous bulk processing.

    Better Deliverability

    Reduce bounces, protect your sender reputation, and land more emails in the primary inbox.

    Easy Integrations

    Connect with Mailchimp, Shopify, Zapier, webhooks, or use our REST API and SDKs to plug into your stack.

    How It Works

    Clean Your Email List in Three Simple Steps

    From single emails to lists of millions — get accurate, fast, and actionable verification results in minutes.

    01

    Upload or Connect

    Verify a single email instantly, upload a CSV for bulk validation, or connect via our API and integrations.

    02

    We Verify in Real Time

    Our multi-step SMTP engine checks syntax, MX records, mailbox existence, catch-all status and more — so you get an actionable verdict.

    03

    Send With Confidence

    Download a clean list, sync results back to your tools, and watch your inbox placement and deliverability improve.

    What Verification Does for You

    Bounce rateReduced
    Inbox placementSignificantly improved
    Sender reputationProtected

    *Results vary based on list quality and sending practices.

    Who It's For

    Built for anyone who sends email

    Email marketers
    Sales & cold outreach teams
    Recruiters & lead gen
    Newsletter creators
    Startups & SaaS platforms
    New — MCP server

    Verify emails right inside Claude, ChatGPT & Cursor

    Connect the VeriMailX MCP server once and your AI assistant can verify addresses, clean lists and check credits on your account — secured with OAuth, no API keys to paste.

    OAuth 2.1 sign-in One-click connect 5 tools
    Explore the MCP serverRead the API docs

    Server URL

    https://www.verimailx.com/mcp
    • verify_emailFull SMTP-level check on one address
    • verify_email_listUp to 20 addresses in one call
    • check_disposable_domainFree blocklist lookup
    • get_credit_balancePlan, credits and usage
    • list_validation_jobsRecent verification history
    Infrastructure

    Powerful Features. Simple to Use.

    Everything you need to verify, clean, and manage your email lists — all in one place.

    API-First

    RESTful endpoints with OpenAPI documentation, SDKs, and webhook callbacks.

    High Throughput

    Process over 1 million validations per hour with dedicated infrastructure.

    Clean IP Pools

    Distributed IP rotation across global regions for maximum deliverability.

    Tiered Routing

    Intelligent multi-step verification with fallback routing for hard-to-reach domains.

    Usage Tracking

    Real-time credit consumption dashboards with per-client breakdowns.

    Billing Accuracy

    Only valid API calls consume credits. Failed lookups are not charged.

    Scalable Architecture

    Horizontally scalable backend that grows with your business volume.

    White-Label Portal

    Custom-branded client portal with your logo, domain, and color scheme.

    Partners

    Used by agencies & SaaS platforms

    Powering growing validation businesses globally.

    "We resell VeriMailX validation to our clients and the margins are excellent. The API integration took less than a day and now it's a fully automated revenue stream for us."
    Priya S.Amit K.Neha R.

    Priya S.

    Founder at LeadSync Agency

    Get Started

    Ready to clean your list and boost deliverability?

    Sign up free and start verifying emails in seconds. No credit card required.

    Free account • 5 free checks per day • No credit card required