Send email from your Vercel project in seconds

PostStack is a European-hosted email API for transactional and marketing email — a GDPR-native alternative to Resend and Postmark.

Install this integration to automatically inject your PostStack API key as POSTSTACK_API_KEY into the Vercel projects you select. No copy-paste, no leaked keys in .env files.

What you get

• Transactional & broadcast email via verified domains (SPF/DKIM/DMARC)
• Open, click, bounce, and complaint tracking in real time
• Contacts, segments, templates, and visual builder
• Self-hosted infrastructure in the EU — your data never leaves Europe
• Pay-as-you-go EUR pricing, no seat fees

After installing

1. The integration adds POSTSTACK_API_KEY to your selected Vercel projects automatically.
2. Use it from any framework with our TypeScript SDK, Python SDK, or plain fetch:

import { PostStack } from '@poststack/sdk';
const ps = new PostStack(process.env.POSTSTACK_API_KEY);
await ps.emails.send({
  from: 'hello@yourdomain.com',
  to: 'user@example.com',
  subject: 'Welcome',
  html: '<p>Thanks for signing up</p>',
});

3. Verify a sending domain in your https://poststack.dev/dashboard/domains — DNS records can be
auto-pushed to Vercel-managed domains.

Rotate or revoke

The integration creates a dedicated, scoped API key. Revoke it any time from Dashboard → Settings →
Integrations → Vercel, or simply uninstall the integration — we'll clean up the env vars automatically.

Support

Email support@poststack.dev or visit https://poststack.dev/support.