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Papercut SMTPInbucket
Free

Free and open source under the Apache-2.0 licence.

 Free

Free and open source under the MIT licence.

Windows, Self-hosted Windows, Linux, Self-hosted
  • Catches test emails without sending them
  • Simple desktop interface for reading captured messages
  • Accepts mail for any address without setup
  • Web interface plus SMTP and POP3
  • Meant for testing, not a real mail server
  • Desktop app is Windows-only
  • Meant for testing, not for real mail delivery
  • You run and maintain the server yourself
Downloadable app, Self-hosted Downloadable app, Self-hosted
Open source Open source
License: Apache-2.0 License: MIT
No account needed No account needed
Works offline Works offline

Checked October 2, 2026

Checked October 2, 2026

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