Postmark
Transactional email service renowned for industry-leading deliverability. Postmark is the developer's choice for critical transactional email — password resets, receipts, and alerts.
Proprietary
TypeScript / Python
Why Postmark?
Critical transactional email needing best deliverability
You've had deliverability issues with other providers
Simple, reliable email without marketing features
Signal Breakdown
What drives the Trust Score
Download Trend
Last 12 months
Tradeoffs & Caveats
Know before you commitMarketing email campaigns (Postmark is transactional only)
High volume on a budget (more expensive than SendGrid)
You need drag-and-drop template editors
Pricing
Free tier & paid plans
Free 100 test emails/mo
From $15/mo (10k emails)
Higher deliverability justifies premium pricing
Alternative Tools
Other options worth considering
Modern transactional email API built for developers. Native React Email support, clean SDK, excellent deliverability, and a generous free tier (3k emails/month). The fastest-growing email tool in the ecosystem.
Often Used Together
Complementary tools that pair well with Postmark
Learning Resources
Docs, videos, tutorials, and courses
Get Started
Repository and installation options
View on GitHub
github.com/ActiveCampaign/postmark.js
npm install postmarkpip install postmarkerQuick Start
Copy and adapt to get going fast
import { ServerClient } from 'postmark';
const client = new ServerClient(process.env.POSTMARK_API_TOKEN);
await client.sendEmail({
From: 'noreply@myapp.com',
To: 'user@example.com',
Subject: 'Your receipt',
HtmlBody: '<p>Thank you!</p>',
});Code Examples
Common usage patterns
Send with template
Use Postmark email templates
await client.sendEmailWithTemplate({
From: 'noreply@myapp.com',
To: user.email,
TemplateAlias: 'welcome',
TemplateModel: { name: user.name, product_url: 'https://myapp.com' },
});Bounce handling
Process bounce webhooks
// Postmark sends POST to your webhook URL
app.post('/webhooks/postmark', (req, res) => {
const { RecordType, Email } = req.body;
if (RecordType === 'Bounce') {
await db.users.update({ emailBounced: true }, { where: { email: Email } });
}
res.sendStatus(200);
});Community Notes
Real experiences from developers who've used this tool