What is an email API? A Clear Guide

An email API lets your app send email over HTTPS instead of raw SMTP, with delivery events, analytics and easier scaling.

Why it matters

Knowing an email API helps you build reliable sending. See the email API quickstart.

How Rainmail helps

Rainmail sends from your own domain on a dedicated, isolated IP with SPF, DKIM, DMARC, reverse-DNS and managed warm-up handled for you, a REST API, and an AI watching deliverability — and it welcomes senders SES, SendGrid and Mailchimp reject, from $8. Run the free checker or see plans.