Documentation
Build with Mailsflux
Everything you need to integrate email and physical mail into your application.
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Quickstart
Send your first email in under 5 minutes.
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SDK Reference
Official SDKs for Node.js, Python, Go, PHP, Java, and Ruby.
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API Reference
Full REST API documentation with request/response examples.
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Physical Mail API
Send envelopes, postcards, and parcels with one API call.
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Webhooks
Receive real-time delivery events in your application.
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IP Warm-up Guide
Understand how automatic IP warm-up works and what to expect.
Guides
Setting up SPF, DKIM & DMARC
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Managing bounce and complaint suppression
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Using templates with dynamic variables
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Sending transactional email via API
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Building a marketing campaign with the visual editor
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Physical mail: address validation & tracking
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Configuring Webhooks for delivery events
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Connecting to Zapier and Make
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