Load testing SMTP
Perform transactional email load tests using dummy mail accounts that can handle high volume email ingestion. Group results with inbox tagging and wait functions.
Site reliability
Email and SMS for your K6 tests
Send and receive email at scale from K6 automations using MailSlurp messaging APIs. Real load testing and reliability for SMTP, transactional mail, and application user flows.
Trusted by teams shipping customer messaging
Load test
Stress test email
Send high volume email blasts to enable SMTP server load testing at scale. Create real email accounts on demand inside K6 scripts.
Stress test infrastructure
Measure email deliverability and latency in your system. Perform email service uptime monitoring and measure inbox ingestion speed testing.
Performance testing application
Ensure application uptime and responsiveness under heavy load. Create bulk email accounts to simulate user actions in your system then hammer your system and MailSlurp inboxes - our infrastructure is backed by retry queues and serverless ingestion.
Delivery confirmation
Verify transactional emails get to their recipients reliably and on time. MailSlurp offers deep DKIM, SPF, DMARC and reputation analysis.
Load test email and SMS with K6
Key workflows
Move from evaluation into a concrete MailSlurp workflow, then expand once the first path is running cleanly.
Workflow 01
Control email accounts in K6
Send and receive email inside your scripts using built in `http` requests.
Workflow 02
Works seamlessly
Simple but powerful HTTP APIs designed for testing allow you to verify emails and sent and received in your application.
Workflow 03
Visual interface for test recording
Use MailSlurp inside K6 Studio with no-code support for test recording and script generation.
Developer integration
Use inbox APIs, SMTP, and webhook events in the same workflow
Start with SDK helpers for inbox creation and message waits, then move into event-driven routing when the workflow expands.
- Generated SDKs for major languages
- API + SMTP + IMAP support where needed
- Docs-backed patterns for inboxes and message assertions
Site reliability + messaging
Site reliability + messaging
Add email and SMS to your test suites today