PostStack

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:

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import { PostStack } from '@poststack/sdk';
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const ps = new PostStack(process.env.POSTSTACK_API_KEY);
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await ps.emails.send({
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  from: 'hello@yourdomain.com',
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  to: 'user@example.com',
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  subject: 'Welcome',
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  html: '<p>Thanks for signing up</p>',
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});
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3. Verify a sending domain in your https://poststack.dev/dashboard/domains — DNS records can be
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auto-pushed to Vercel-managed domains.
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Rotate or revoke
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The integration creates a dedicated, scoped API key. Revoke it any time from Dashboard → Settings →
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Integrations → Vercel, or simply uninstall the integration — we'll clean up the env vars automatically.
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Support
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Email support@poststack.dev or visit https://poststack.dev/support.