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SMTP2GO

1,000 emails a month on a free plan that never expires, with API and SMTP relay

SMTP2GO is a transactional email relay with both an HTTP JSON API and a standard SMTP interface. The free plan sends 1,000 emails per month (200/day) with reporting, webhooks, and up to 5 sender addresses, has no time limit, and needs no credit card.

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Free tier

Free forever: 1,000 emails/month, 200/day, no credit card

Rate limits

200 emails/day; unverified accounts also limited to 25 emails/hour (hourly cap removed after sender-domain verification)

Auth

API key

Base URL

https://api.smtp2go.com/v3

What you'd build with it

Drop-in SMTP relay for apps and tools that only speak SMTP
Send transactional mail via JSON from an automation
Pull delivery and bounce stats into a dashboard
Low-volume side projects that want a free tier that does not expire

Key endpoints

POST/email/sendSend a transactional email via JSON
POST/stats/email_summaryGet aggregate send/delivery statistics
POST/stats/email_bouncesList bounced messages over a period
POST/sender_domain/viewView configured sender domains and verification status

Members

Members get the runnable recipe

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