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Power AI sales agents with clean email data

The complete toolkit to verify, validate, and clean your email lists at scale. One API.

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Single address

Try one:
Live result
probe-runner · workflow-orchestrator
0/5 activities
Standby · demo loop armed
target: demo · info@contact-form.io
[ .JSON ]

Run a live check to see the public result

Built for revenue teams who need explainable Pre-Send Decisions— not raw bounce guesses or borrowed customer logos.

[ OK ]

Pre-Send Decision, not a bounce guess

[ OK ]

Reason codes explain the "why" behind every verdict

[ OK ]

Catch-all and webmail flagged as uncertain, never rounded up to "safe"

[ 01 / 06 ]The problem
[ RISK ]

A "valid" label can't tell you what to do next

SMTP-OK ≠ SAFE

A "valid" SMTP handshake doesn't mean the mailbox is safe to email at scale.

CATCH-ALL

Catch-all domains accept everything and reveal nothing. Treating them as valid is a guess.

REPUTATION

One bad send can hurt sender reputation for every campaign that follows.

[ 02 / 06 ]How it works

How it works

Try a live check above
[01]Upload your listCSV or API, same contract either way.
[02]Get a Pre-Send DecisionConfidence, reason codes, and risk. Not a bare status.
[03]Send with contextKnow which contacts to send, review, or suppress.
[ 03 / 06 ]Decision support
[ PRE-SEND ]

Decision-support, not a commodity lookup

Most verifiers stop at valid or invalid and leave the risk call to you. Bounceless adds a Pre-Send Decision: confidence, reason codes, and honest uncertainty on catch-all and major webmail, so your team decides before the send, not after the bounce.

    [01]List uploaded
    [02]Engine verifies
    [03]Confidence assigned
    [04]Reason codes attached
    [05]Pre-Send Decision
[ 04 / 06 ]Workflow parity

One verification contract: UI, API, and webhooks

Operators and automation share the same result shape: confidence, reason codes, and Pre-Send Decision.

UIOperator workspaceUpload lists, review decisions, and export with audit-friendly context.
APIREST APIProgrammatic verification with the same confidence and reason-code fields.
WEBHOOKEvent webhooksPush completion events to your stack without re-parsing opaque statuses.
AI-native by design: MCP server and agent skills speak the same contract.
[ 05 / 06 ]Platform
[ 01 / 04 ]Email verification

Email verification

Verify addresses with confidence scores and reason codes, not binary labels.

Learn more
CatchAllCatch-all domainWhat this means

The domain accepts all addresses at the SMTP level, so deliverability can't be confirmed with certainty.

RoleAccountRole accountWhat this means

The address looks like a shared inbox (info@, support@) rather than a named recipient.

MailboxFullMailbox fullWhat this means

The receiving server confirmed the mailbox exists but is currently rejecting new mail.

[ 02 / 04 ]Pre-Send Decision

Pre-Send Decision

Action guidance above raw status: send, review, or suppress with evidence.

Learn more

Pre-Send Decision

Review before sending

Medium confidence

Catch-all domain accepted the address but couldn't confirm the mailbox. Route to a smaller test segment before a full send.

  • CatchAll
  • Review

Built from engine observations and your policy, not a bare VALID/INVALID label.

[ 03 / 04 ]Honest uncertainty

Honest uncertainty

Catch-all and major-webmail outcomes explained, never implied safe-to-send.

Learn more
Not available

Major webmail domain

Gmail and similar providers don't expose mailbox status by design. Flagged as uncertain, never rounded up to "safe".

[ 04 / 04 ]Workflow parity

Workflow parity

Same verification contract for operators, API consumers, and webhooks.

Learn more
UIAPIWEBHOOK

Same result shape everywhere: confidence, reason codes, and Pre-Send Decision.

[ 06 / 06 ]GET STARTED
[ SEND ]

Spot risky contacts before your next send, not after

Test your list on 1,000 free credits: no card, no commitment, same engine as the playground above.

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