Email verification API

Email verification API and email validation API for signup, import, and pre-send control

Treat verification as a workflow control, not a one-time cleanup. MailSlurp classifies addresses, routes uncertain records into review, and protects delivery quality across the contact lifecycle.

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Product features

MailSlurp capabilities for verification checkpoints

Use the MailSlurp features that make the workflow work reliably in production, not just in a quick demo.

Verify single addresses in real time

Call the MailSlurp verification API from signup forms, admin tools, or backend services before bad records land in product or marketing systems.

Check one address at signup or profile update
Return structured verification results to calling systems
Use the same API from app, admin, or CRM flows

Screen imports and list uploads before activation

Validate migration lists, partner uploads, and CRM imports before they create bounce exposure in downstream sends.

Check imported contacts before they enter production sends
Route risky or stale records into review queues
Keep send lists cleaner from day one

Re-check stale contacts before send

Run verification again at launch time when a contact has aged, changed owners, or moved into a higher-risk lifecycle segment.

Revalidate dormant or high-value segments
Reduce bounce spikes before campaigns and alerts
Use stricter checks for auth and transactional paths

Store verification results with the workflow

Attach timestamped verification outcomes to support, compliance, and deliverability operations so teams can explain why an address was allowed, reviewed, or blocked.

Persist status with source workflow and run time
Give support a concrete reason for a held address
Pair address-quality results with sender-health monitoring

Key workflows

High-value verification workflows

Start with the workflow you need most, then expand the same MailSlurp setup into adjacent use cases once the first route is working.

Workflow 01

Validate addresses before account creation or activation

Catch obvious risk and typo-driven failures early without forcing an unnecessarily hard block on uncertain users or creating avoidable support work.

Open email platform

MailSlurp product workspace showing email, phone, dashboard activity, and developer automation

Workflow 02

Screen CRM and list imports before they affect production sends

Route uncertain records into review instead of poisoning send-critical workflows, CRM syncs, or support systems.

Open routing workflows

Workflow 03

Re-check stale contacts before campaigns or high-value sends

Address quality changes over time. Verification at send time helps reduce bounce spikes, protect sender trust, and prevent wasted send volume.

See deliverability monitoring

Developer integration

Verify addresses before they enter send-critical paths

Run address checks at signup, import, or pre-send checkpoints and return structured outcomes that downstream systems can act on immediately.

iOS

Call verification from product, CRM, and lifecycle workflows
Classify records for pass, review, or reject handling
Keep verification results connected to support and audit trails

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Protect address quality

Use verification as a workflow control, not a one-time cleanup job

Introduce staged policies where address quality already changes business outcomes, then expand once the team trusts the review process and saved results.

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