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Free Email API: What You Get and Where the Limits Are

What a free email API tier realistically includes, what to watch for, and how to know when to upgrade.

Mark Tihonov
Developer relations, API
9 марта 2026 г.5 мин чтения

A free email API is the fastest way to start sending from code without a contract. But "free" varies a lot — here is what to expect and what to check.

What a good free tier includes

  • A monthly send allowance big enough to build and test.
  • Full authentication — SPF, DKIM, DMARC.
  • Webhooks and a delivery log, not just send.
  • Both API and SMTP access.

What to watch for

Some "free" tiers strip authentication, hide analytics, or stamp your emails with their branding. Read the limits before you build on them.

Sendersy

Send email that actually lands in the inbox

API and visual editor, SPF/DKIM/DMARC out of the box, analytics and warm IPs. Free tier — 200 emails/month, no card required.

When to upgrade

Move up a tier when you outgrow the monthly allowance or need more domains, higher rate limits or dedicated support — not before.

Generous and complete

Sendersy's free tier includes 200 emails a month with full authentication, webhooks, analytics and SMTP — no card. Start free.

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Автор
Mark Tihonov
Developer relations, API

Объясняет, как слать письма из кода. Любит чистые SDK, идемпотентность и понятные вебхуки.