Email API1 min read
What Is a Transactional Email API? (Explained for Founders)
Password resets, receipts, and alerts — how HTTPS email APIs work, why they beat SMTP in apps, and how OquMail includes one on the free plan.
A transactional email API lets your application send email with an HTTPS request instead of opening an SMTP connection. Your backend posts JSON — to, subject, body — and the provider handles delivery, retries, and authentication.
Typical use cases
- Account verification and password reset codes
- Order receipts and shipping notifications
- Billing invoices and payment failures
- Team invites and role changes
- Monitoring alerts from your infrastructure
OquMail API basics
Create an API key per mailbox in the admin panel. POST to /api/v1/emails with Bearer auth. Messages send from your verified domain with DKIM, appear in delivery logs, and can be marked no-reply to block responses.