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What is Mailtarget

Mailtarget is enterprise email infrastructure. The platform sends transactional and marketing email at scale, runs on its own MTA, ships SDKs across major languages, and treats deliverability as a first-class concern rather than an afterthought.

What you get​

  • Email API. A JSON HTTP API for sending transactional messages, with server-side templates, substitution data, attachments, metadata, and a transmission ID you can reconcile against webhook events.
  • SMTP relay. A relay endpoint that drops in front of an existing mail stack. One host, one port, STARTTLS, an API key as the password.
  • SDKs. Official SDKs in Node.js, Go, Java, Kotlin, PHP, C#, JavaScript. cURL examples for everything else.
  • Sending domain management. SPF, DKIM, DMARC, plus a tracking domain and a bounce domain you control. Every record is verifiable through the dashboard or API.
  • Webhooks. Delivery, open, click, bounce, complaint, and unsubscribe events. Signed payloads. Retries.
  • Mailtarget CDP. Audience segmentation, event-driven journeys, and contact-level engagement state. This ships as a Mailtarget capability, not a separate product.
  • Analytics. Per-message tracking, per-campaign reports, per-domain reputation views.

Who operates it​

Mailtarget is operated by PT Target Sukses Sinergi, an Indonesian company that has been running email infrastructure since 2014.

The platform is ISO/IEC 27001:2022 certified. Banking, insurance, and regulated financial customers depend on this posture. Compliance is part of the contract, not a marketing line.

Where Mailtarget fits​

Mailtarget is for teams that treat email as part of how they run the business. If email is the channel that confirms a payment, delivers a one-time password, releases a payslip, or notifies a customer about a critical event, that is the workload Mailtarget is built for.

Mailtarget is not optimized for one-person blogs or hobby projects. The platform is designed for production traffic with strict deliverability and security requirements.

What this documentation covers​

These docs cover the developer surface: API, SMTP, authentication, domains, webhooks, errors, deliverability operations, and Mailtarget CDP. End-user features such as the campaign builder, page builder, and form builder live in the Help Center, not here.

Next​

Decide whether you want the API path or the SMTP path. Read API vs SMTP for the comparison, then jump to the quickstart that matches.