Template and rendering QA
Preview campaign and lifecycle messages across real email clients, including Outlook and mobile contexts, and catch layout regressions before customers see them.
Open email QAMailSlurp helps lifecycle, CRM, and engineering teams catch Outlook rendering issues, broken links, missing assets, unsubscribe-header mistakes, spam-check risks, inbox placement drift, and sender-readiness issues before launch.

Trusted by top companies worldwide




Review the message customers will receive, validate links and images, inspect preview text, and verify template behavior before a launch window becomes a support incident.
5 successful checks
Rendering, links, sender authentication, and launch evidence were validated before approval.
Use repeatable checks for links, previews, content, and sender posture so lifecycle, engineering, brand, and compliance owners can make the same launch decision.
Run practical checks that help teams approve sends with real message evidence instead of screenshots and manual inbox review.
Preview campaign and lifecycle messages across real email clients, including Outlook and mobile contexts, and catch layout regressions before customers see them.
Open email QAFind broken CTAs, missing images, mailto link mistakes, tracking problems, and content issues before campaign approvals are complete.
Pair content checks with DMARC, SPF, DKIM, MX, unsubscribe headers, spam checks, and inbox placement evidence for a stronger launch decision.
Open deliverability monitoringDefine which rendering, link, image, authentication, and unsubscribe issues block launch and keep pass/fail results visible for recurring campaign and lifecycle work.
Give lifecycle, engineering, brand, and compliance teams the same artifacts when a send is ready to approve.
Use dedicated inboxes and checks to monitor recurring campaign streams as templates and sender settings change.
Integrate 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.
Message evidence
Inbox + render
Pair receipt, placement, links, assets, and previews.
Sender readiness
SPF + DKIM
Include DNS posture and spam-check signals before launch.
Mature platform
10+ years
Stable workflows for recurring campaign and lifecycle sends.