InboxEmail Verification
Check an address before you add it to a campaign. See its status, risk score and the reason behind the result.
SolutionsDeep Verification. One Outcome
The Intelligence Behind Every Valid Email
Precision over volume: every check is a real conversation with the receiving mail server, not a lookup in a stale database.
Email Finder
Turn a name and company domain into likely address patterns, then deep-check candidates before returning a match.
Deliverability
Review SPF, DKIM, DMARC and the other sending-domain checks that affect your readiness to send.
Results
Real Actionable Results. No Guesswork.
A verifier that never says “I don’t know” is guessing. Here is every verdict InboxValid returns and what each one means for your next send.
Validsara@acmecorp.com
The mailbox answered. We opened a real SMTP conversation with the receiving server and it accepted the recipient, so this address can be mailed today.
Invalidbilling@oldstartup.io
The server rejected the recipient outright. Sending here is a guaranteed hard bounce, and hard bounces are what mailbox providers count against your reputation.
Catch-Allhello@agency-mail.net
The domain accepts everything, so acceptance proves nothing. We say so instead of scoring it valid, and give you a risk score to decide with.
Disposabletmp4821@mailinator.com
A throwaway inbox from a known temporary provider. It will stop existing shortly and it never belonged in a nurture sequence.
Role Accountsupport@acmecorp.com
A shared functional mailbox rather than a person. Deliverable, but it draws complaints in cold outreach, so it is flagged separately from invalid.
Unknownj.chen@enterprise.co
The server would not give a straight answer within the retry window. We return unknown rather than guessing, and you are not charged for it: re-run those rows later and you pay only for the ones that finally resolve.
Real-Time SMTP Verification
Every address is checked live against its mail server, covering syntax, MX records and mailbox existence, in about two seconds.
response
{
"email": "sara@acmecorp.com",
"status": "valid",
"sub_status": "mailbox_exists",
"provider": "google",
"mx_host": "aspmx.l.google.com",
"risk_score": 4
}Verified Email Finder
Enter a name and company domain. InboxValid generates likely work-email patterns, deep-checks each candidate and returns a verified match instead of an untested guess.
verified match
Sara Chen · acmecorp.com pattern first.last candidate sara.chen@acmecorp.com status found and verified
Deliverability Audits
One click grades a domain across 8 checks: MX, SPF, DKIM, DMARC, PTR, blocklists, MTA-STS and BIMI, plus a Gmail/Yahoo/Microsoft bulk-sender verdict.
audit
acmecorp.com grade B+ MX pass SPF pass DKIM pass DMARC p=none PTR pass blocklist clean MTA-STS none BIMI none
Bulk List Cleaning
Upload CSV, Excel or JSON files with up to 50,000 contacts per job, watch live progress and pay only for what runs: unused credits are refunded.
job progress
job_8f21c4 running 38,204 / 50,000 valid 29,881 invalid 5,402 catch-all 2,117 unknown 804
Catch-All & Risk Detection
Spot catch-all domains, role accounts and risky addresses with a per-email risk score, so you decide what makes the cut.
flags
hello@agency-mail.net catch-all risk 58 support@acmecorp.com role risk 41 sara@acmecorp.com clean risk 4
Disposable Email Filtering
Temporary and throwaway inboxes are flagged automatically before they ever pollute your list or skew your metrics.
signup guard
if (result.is_disposable) {
return reject("Use a permanent address");
}Developer-First API
Verify at signup, in your CRM or anywhere else with simple API keys, a REST API with rich structured results, and live job progress over SSE.
request
curl https://api.inboxvalid.com/v1/verify \
-H "Authorization: Bearer $IV_KEY" \
-d '{"email":"sara@acmecorp.com"}'See It Run on Your Own List
Every account starts with free credits; eligible business emails can apply for 100,000.
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