Tired of overpaying for emails, I built Senddock: A Self-Hostable Email API and Campaign Platform

Sebastian Vargas — Tue, 05 May 2026 06:44:55 +0000

Handling emails in modern applications often feels like choosing between two evils: either you pay a fortune to SaaS providers as your user base grows, or you fight with ancient SMTP servers that have terrible Developer Experience (DX).

I wanted something with a modern, clean API (think Resend or Stripe), that could handle both transactional emails and marketing campaigns, but with the freedom to host it on my own infrastructure.

Since I couldn't find exactly what I was looking for, I built Senddock.

What is Senddock? 📧

Senddock is a developer-first platform and API for everything related to email. We designed it with the architecture that most devs and agencies need today in mind.

These are the core pieces (you can deep dive into our documentation):

Transactional & SMTP: Send confirmation emails, password resets, etc., using our RESTful API or SMTP credentials.
Campaigns & Subscribers: It's not just transactional. You can manage subscriber lists, segment audiences, and launch mass campaigns.
Workspaces & Projects: Perfect for agencies or multi-tenant architectures. You can separate clients or dev/prod environments natively.
Templates: Manage your email designs from a single place.
Analytics & Webhooks: Track open rates, clicks, and bounces. Connect webhooks so your backend can react when a user clicks on an email.

The Developer Experience (DX) 💻

We wanted the integration to be as frictionless as possible. Here is what a basic send looks like using our API:

// Example using Fetch (or your favorite HTTP client)
const API_URL = 'https://api.senddock.dev/v1/send';

const response = await fetch(API_URL, {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    workspaceId: "ws_12345",
    projectId: "proj_67890",
    to: "user@example.com",
    subject: "Welcome to our app!",
    templateId: "tpl_welcome_01",
    data: {
      name: "Dev.to User"
    }
  })
});

const data = await response.json();
console.log('Message ID:', data.messageId);

The best part: It's Self-Hostable 🛠️

For me, this is the killer feature. If you don't want to rely on our cloud, you have total control over your data and privacy.

You can spin up the entire Senddock infrastructure on your own server. We've documented the whole process, from environment requirements to installation and configuration.

I'd love to hear your feedback 🤝

Senddock is fresh out of the oven and the documentation is live at docs.senddock.dev.

If you are building a SaaS, running an agency, or just like to tinker with infrastructure tools, I invite you to check it out.

What features do you consider vital in an email service that are usually missing?
If you self-host, what are the common hurdles you find when setting up these kinds of platforms?

I'll be reading and replying to all comments below! 👇

Forem: Sebastian Vargas

Tired of overpaying for emails, I built Senddock: A Self-Hostable Email API and Campaign Platform

What is Senddock? 📧

The Developer Experience (DX) 💻

The best part: It's Self-Hostable 🛠️

I'd love to hear your feedback 🤝