# Features MailSlurp is easier to understand when you split it into product pillars instead of individual endpoints. Use this page to browse the platform in the same way teams usually adopt it: messaging, testing and QA, monitoring, automation, team governance, and developer APIs are organized below as direct entry points.

Messaging

Provision inboxes, domains, phone numbers, and connected mailboxes for real workflows.

Address verificationValidate recipients before they hurt onboarding or sender trust. AttachmentsUpload, download, and process files attached to email workflows. Custom domainsUse branded sender domains and manage production email identities. EmailsSend, receive, inspect, and download messages and attachments. External mailboxesConnect Gmail, Outlook, and other providers into MailSlurp workflows. InboxesCreate permanent or disposable inboxes for apps, tests, and automations. Plus addressesRoute sub-addresses into one inbox without provisioning every alias. TXT/SMSProvision real phone numbers and receive or send SMS in code.

Testing and QA

Validate sign-up flows, OTP paths, rendering, compatibility, and delivery before release.

Deliverability testsRun expectation-based delivery checks across inbox or phone cohorts. Device previewsPreview email rendering across clients and devices before launch. Email auditCheck links, images, authentication posture, and message quality. Email compatibilityCheck feature support and content behavior for email HTML/CSS. Test interfaceUse the no-code testing UI when you need a quick visual workflow. Testing overviewEnd-to-end email and SMS testing patterns for CI, staging, and release gates. Wait for conditionsReplace sleeps with deterministic waits for matching messages.

Monitoring

Track sender health, campaign behavior, and message quality after your systems go live.

Campaign ProbeCapture live campaigns for ongoing QA, audits, and alerting. Domain MonitorTrack SPF, DKIM, DMARC, MX, and sender-health drift over time. Monitoring overviewUnderstand the release-quality and sender-health monitoring stack. ReputationProtect sender trust with bounce, complaint, and suppression controls.

Automation

Build event-driven routing, forwarding, AI extraction, and reply workflows.

AI transformersExtract structured data from messages and attachments for automation. Alias proxyMask addresses while still routing replies back into your workflows. Auto replyConfigure automatic response behavior for operational mailboxes. ForwardingForward messages into downstream systems or operational inboxes. Routing rulesApply allow/block and workflow rules to inbound email handling. WebhooksPush message and entity events into your applications in real time.

Team and Governance

Control environments, sharing, SSO, retention, and least-privilege access.

EnvironmentsIsolate staging, production, and workflow-specific resources inside one org. Guest portalsCreate branded access experiences for external or customer users. Roles and permissionsDesign least-privilege access using custom roles and per-user permissions. SAML SSOControl sign-in with your identity provider and organization policy. StorageUnderstand retention, deletion, and storage behavior across resources. Team accountsShare inboxes, users, and organization controls safely across teams.

Developer Tooling

Start with the API, SDKs, examples, and protocol access patterns that fit your stack.

API referenceBrowse the MailSlurp REST API and endpoint groups. AuthenticationConfigure API keys and safe auth patterns across environments. ExamplesBrowse runnable examples and end-to-end reference projects. IMAP / SMTPUse protocol access when you need real mailbox credentials. PaginationHandle long-running list workflows safely and predictably. SDK librariesJump into JavaScript, Java, Python, Go, C#, PHP, Ruby, and more.