Developer docs · InboxRatio Editorial
SMTP2GO email API: SDKs, docs and limits (2026)
Every link below points into SMTP2GO's official developer documentation and was checked on 10 September 2026. We record only what the vendor documents — a field we could not verify at the source is left out, never guessed.
From SMTP2GO's official docs · checked 10 September 2026
Docs, SDKs and limits
- Developer docs
- developers.smtp2go.com/
- API reference
- developers.smtp2go.com/reference/
- SDK languages
- .NETGoNode.jsPHPPythonRubyRustAs listed in SMTP2GO's official SDK docs
- SMTP relay
- Yes · SMTP docs
- Webhooks
- Webhook docs
- Rate limits
- The /activity/search endpoint is limited to 60 requests per minute; new paid accounts start with a temporary sending quota of 1,000 emails per day, and the free plan allows 200 emails per day and 1,000 per month. Source
- Pricing page
- www.smtp2go.com/pricing/
From our feature matrix — documented by the vendor
API, SMTP and sending auth
- API'An understandable API' with 'full examples of code in multiple languages'
- SDKs / client librariesCode examples in JavaScript, NodeJS, PHP, Ruby, Python; packaged SDK libraries not stated
- Public API docs'See our API documentation' — public docs
- WebhooksAll plans: 1 webhook on Free, up to 10 on paid
- SMTP APISMTP relay core service
- SMTP relaySMTP relay is the core service
- Transactional emailCore product — 'Email delivery done right'
- SPF assistance'Easily authenticate emails with DKIM and SPF'; sender domains get 'Automatic DKIM/SPF' on all plans
- DKIM setup'Automatic DKIM/SPF' on sender-domain setup (all plans)
- DMARC supportnot documented in developers.smtp2go.com/llms.txt index; support.smtp2go.com help center returned 403 — searched 2026-09-10
Features checked 10 September 2026. ✓ documented · ◐ limited or plan-gated · × documented as absent · — not documented. Documentation is not a measured result — see our methodology.
Pricing snapshot
Generated from our datasets — every value verified and dated
Frequently asked questions
Where are the official SMTP2GO API docs?
SMTP2GO's official developer documentation is at https://developers.smtp2go.com/, and the API reference is at https://developers.smtp2go.com/reference/. Links checked on 10 September 2026.
Does SMTP2GO have an SDK for Python?
Yes. Python is among the SDK languages listed in SMTP2GO's official docs: .NET, Go, Node.js, PHP, Python, Ruby and Rust (checked 10 September 2026).
Does SMTP2GO support SMTP relay?
Yes. SMTP2GO's official docs document SMTP relay sending: https://developers.smtp2go.com/docs/smtp-relay (checked 10 September 2026).
What are the SMTP2GO API rate limits?
The /activity/search endpoint is limited to 60 requests per minute; new paid accounts start with a temporary sending quota of 1,000 emails per day, and the free plan allows 200 emails per day and 1,000 per month. Source: SMTP2GO's official documentation at https://developers.smtp2go.com/docs/rate-limiting, checked 10 September 2026.
Does SMTP2GO offer webhooks?
Yes. SMTP2GO's official docs cover webhook event notifications: https://developers.smtp2go.com/docs/webhooks-overview (checked 10 September 2026).