A reliable email delivery platform for developers and small teams. Clean REST API, SMTP relay, and the developer experience you deserve.
From transactional emails to marketing campaigns, PostZeno gives developers and small teams a reliable foundation.
JSON API with batch sending, retries and idempotency. Send single emails or thousands in one request.
DKIM, SPF and DMARC built-in. TLS 1.2+ encryption for all API and SMTP traffic.
Smart retry queues, suppression lists and bounce handling so your emails reach the inbox.
Track opens, clicks, bounces in real-time. Webhooks for every event. Detailed logs for debugging.
Drop-in SMTP replacement. Migrate from any provider in minutes without changing your application code.
Dynamic templating with Handlebars. Manage via API or visual editor.
Add your domain, verify DNS records, and grab your API key. Takes less than 5 minutes.
Use our REST API or SMTP relay to send emails. We handle deliverability, authentication, and compliance.
Track every email in real-time. Get webhooks for delivery events. Debug with detailed logs.
Start free. Scale as you grow. No hidden fees, no surprises.
Pay once. Credits never expire — use them at your own pace.
Perfect for side projects and testing
100,000 email credits, one-time purchase
1,000,000 email credits, one-time purchase
3,000,000 email credits, one-time purchase
For high-volume senders and enterprises
Renews monthly. Credits land automatically, stack up, and never expire. Cancel anytime.
1,000,000 email credits added every month
3,000,000 email credits added every month
Built for high-volume senders. Pick 5 or 10 million credits a month at our lowest per-email rate. Boosters stack — add as many as your volume needs.
Need more? Subscribe again — boosters stack, and each one adds 10,000,000 credits every month.
All prices in USD. Credits from every purchase share one balance and never expire.
Get started in minutes with our free tier. No credit card required.