Email & notifications
GreenMail Open-Source Email Testing
Explore this developer service’s ongoing no-cost allowance, restrictions and official documentation before deploying.
Apache-2.0-licensed sandbox email test servers supporting SMTP, POP3 and IMAP, embedded in Java tests or run as a standalone process/container; no software usage quota or hosted mail allowance.
Plan details
What do these plan and deployment labels mean?
- Plan
- Ongoing free allowance
- Deployment model
- Local / embedded
- Credit card
- Not required
- Commercial use
- Allowed
- Added to directory (UTC)
- 2026-11-04
- Last checked
- 2026-11-03
Important restrictions
Designed for email integration tests, not production mail delivery. Requires Java or container runtime and user-provided CI/compute resources; sandbox messages are not forwarded to real recipients. Infrastructure and CI usage can incur costs.
Independent community listing, not affiliated with the provider. Always check the latest billing policy and quotas before enabling paid usage.