Verify the catch-all emails everyone else marks "risky"
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We resolve catch-all and accept-all domains to a definitive verdict — and when a signal is genuinely ambiguous we return "risky" instead of a false "invalid". Marking a real person invalid is the costliest error a verifier can make, so we never do it.
A catch-all domain says yes to every address
On a catch-all (accept-all) domain the mail server says yes to anything, so ordinary verifiers cannot tell a real mailbox from a typo and hand the whole domain back to you as "risky" or "unknown". VeriMailX resolves the individual mailbox to a definitive valid or invalid — live, and without sending an email to the recipient.
Catch-all resolution
A catch-all domain accepts every address at the SMTP layer, so ordinary verifiers can't tell a real mailbox from a fake one and label the whole domain 'risky'. VeriMailX resolves the individual mailbox to a real verdict.
Accept-all checker for M365 & Workspace
Resolution across Microsoft 365, Google Workspace and self-hosted mail — the accept-all domains other tools return as 'unknown'.
Honest risk scoring
When a signal is genuinely ambiguous we return 'risky' rather than a false 'invalid' — we never mark a real, deliverable address invalid.
The pipeline keeps going where other verifiers stop
The first three stages settle the straightforward majority — the same checks every verifier runs. Stage 04 is the difference: the accept-all domains that would otherwise end your report as "risky" get resolved to a definitive verdict.
Built around the addresses nobody else resolves
Syntax, MX, live SMTP, disposable and role signals come as standard. What makes the report usable is the part most verifiers skip: the catch-all and accept-all domains get a real verdict instead of a shrug.
Catch-all resolution
The accept-all addresses other verifiers return as 'risky' or 'unknown' come back as a definitive valid or invalid — with no email sent to the recipient.
Real-Time & Bulk
Resolve one address live, or upload a whole CSV and get catch-all domains resolved across the entire list.
Better Deliverability
Stop guessing on accept-all domains: mail the mailboxes that exist, drop the ones that don't, and protect your sender reputation.
Easy Integrations
Connect with Mailchimp, Shopify, Zapier, webhooks, or use our REST API and SDKs to plug into your stack.
From "risky" to a real verdict in Three Simple Steps
Bring a single address or a list of millions. The catch-all portion — usually the part of your list you were told to guess on — comes back resolved.
Upload or Connect
Verify a single email instantly, upload a CSV for bulk validation, or connect via our API and integrations.
Your catch-alls come back resolved
The accept-all domains that other verifiers hand back as 'risky' or 'unknown' are resolved to a definitive valid or invalid — live, and with no email sent to the recipient. Syntax, MX, disposable and role checks run alongside.
Send With Confidence
Download a clean list, sync results back to your tools, and send to the mailboxes that actually exist.
What Verification Does for You
*Results vary based on list quality and sending practices.
Built for teams whose lists are full of catch-all domains
Resolve catch-alls right inside Claude, ChatGPT & Cursor
Connect the VeriMailX MCP server once and your AI assistant can check an address — accept-all domains included — clean a list and read your credit balance, secured with OAuth and no API keys to paste.
Server URL
https://www.verimailx.com/mcpverify_emailFull SMTP-level check on one addressverify_email_listUp to 20 addresses in one callcheck_disposable_domainFree blocklist lookupget_credit_balancePlan, credits and usagelist_validation_jobsRecent verification history
Catch-all resolution, production-ready.
The platform around the verdict: API, bulk jobs, credit tracking and a white-label portal for teams reselling verification.
API-First
RESTful endpoints with OpenAPI documentation, SDKs, and webhook callbacks — catch-all resolution included in every response.
Built for Bulk
Run whole lists, not just single lookups, with progress tracking on long jobs.
Provider Coverage
Resolution across Microsoft 365, Google Workspace and self-hosted mail servers.
Honest Verdicts
Ambiguous signals return 'risky' — a real, deliverable address is never marked invalid.
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.
Used by agencies & SaaS platforms
Powering growing validation businesses globally.
"Our clients' lists are full of catch-all domains that every other verifier just labelled 'risky'. We resell VeriMailX because it hands those addresses back as valid or invalid — the API integration took less than a day."
Priya S.
Founder at LeadSync Agency
Catch-all verification questions
The accept-all questions we get asked most often.
Still have questions?
Our team responds within 10-30 minutes
Stop guessing on the emails everyone else calls "risky"
Run a catch-all address right now and see a definitive verdict. No credit card required.
Free account • 5 free checks per day • No credit card required