Email Marketing at Scale: Amazon SES, BullMQ Queues, and Template Builders

Sending 100,000 emails without getting blacklisted requires careful queue management. MailBlast handles this with BullMQ worker pipelines.

1. Rate-Limited Sending with BullMQ

Amazon SES has sending rate limits. BullMQ processes emails at a controlled pace:

typescript
import { Queue, Worker } from 'bullmq';

const emailQueue = new Queue('emails', { connection: redisConnection });

const worker = new Worker('emails', async (job) => {
  await ses.sendEmail({
    Source: job.data.from,
    Destination: { ToAddresses: [job.data.to] },
    Message: { Subject: { Data: job.data.subject }, Body: { Html: { Data: job.data.html } } }
  });
}, { connection: redisConnection, limiter: { max: 14, duration: 1000 } });

2. Template Builder

A visual drag-and-drop editor lets marketers build responsive email templates without writing HTML. Templates compile to inline-CSS email markup.

3. Campaign Analytics

Tracking pixels and link redirects measure open rates and click-through rates, displayed in real-time Chart.js dashboards.

Summary

BullMQ rate limiting + SES delivery + visual template editing creates an email platform that scales to millions of sends while maintaining deliverability.