Seed inbox placement tests
Send probes to controlled inboxes and review whether messages appear in inbox, spam, promotions, or other filtered views.
Start placement test
See whether important emails reach inbox, spam, or promotions
MailSlurp runs inbox placement and deliverability checks against mailbox-provider environments so teams can review Gmail, Outlook, spam folder, promotions, authentication, and sender posture before launch. Start with a 7-day free trial.
Trusted by top companies worldwide
Review placement, content analysis, and sender health after each run
Send controlled probes, inspect received headers and folder placement, then review provider outcomes, content findings, and sender-domain health from the saved run.
Inbox placement rate
Seeded inbox checks help teams see whether changes improve real mailbox outcomes.
Monitor sender reputation while you improve placement
Pair inbox placement checks with SPF, DKIM, DMARC, MX, blocklist, and sender-domain monitoring so reputation work is tied to real mailbox outcomes.
What you can check before sending
Use MailSlurp to connect spam testing, sender monitoring, warm-up checks, and campaign QA before important emails go out.
Spam and authentication checks
Inspect headers, content signals, SPF, DKIM, DMARC, MX, and related sender details before risky sends reach customers.
See domain monitoringWarm-up and reputation checks
Track placement changes while sender domains, IPs, and campaigns are prepared for higher-volume or higher-value email.
See warm-up checksCampaign readiness
Combine placement checks with rendering, broken-link, image, and template QA before marketing or lifecycle launches.
See campaign QATransactional email verification
Validate signup, reset, invoice, alert, and onboarding emails with real received messages and saved diagnostics.
See verification checksAlerts and evidence
Keep run history and routing available so failures reach the right owner and fixes can be verified after DNS or content changes.
Start free trialIntegrate MailSlurp Seamlessly
Integrate with any framework
Official plugins and SDKs for all major programming languages, frameworks, and test platforms. All functionality available via API or dashboard.
CI/CD Native
MailSlurp fits right into your existing development, testing, and CI/CD workflows. Deploy and iterate with confidence and actionable feedback.
Global messaging scale
Emails processed
500 million+
Infrastructure that scales.
Mobile networks
20+
Leverage global telecom networks.
Mature platform
10+ years
Stable and dependable.