Auth journeys
Validate magic links, OTP, MFA, and recovery flows with real inboxes and phone numbers.
Open auth testing
MailSlurp gives product, QA, and engineering teams one place to run auth journeys, notification checks, campaign QA, and deliverability-aware release checks.
Trusted by top companies worldwide




Use real inboxes and phone numbers for every run instead of reusing shared accounts or stopping at simulated provider responses.

Give engineering, QA, lifecycle, and release owners a shared view of the message paths that matter before a launch.
Test what users actually receive across auth, transactional, campaign, and cross-channel workflows.
Validate magic links, OTP, MFA, and recovery flows with real inboxes and phone numbers.
Open auth testingAssert signup, reset, invite, billing, and operational messages from end to end.
Open integration testingPreview customer-facing templates across clients and devices before they reach users.
Open rendering checksCatch broken links, missing images, and sender-readiness issues before important sends.
Open campaign QARun one testing workflow when signup, recovery, or MFA spans both channels.
Measure message-dependent flows under stress and connect release checks to sender-health review.
Open reliabilityIntegrate MailSlurp Seamlessly
Official plugins and SDKs for all major programming languages, frameworks, and test platforms. All functionality available via API or dashboard.

MailSlurp fits right into your existing development, testing, and CI/CD workflows. Deploy and iterate with confidence and actionable feedback.
Emails processed
500 million+
Infrastructure that scales.
Mobile networks
20+
Leverage global telecom networks.
Mature platform
10+ years
Stable and dependable.