Papercut SMTP is a 2-in-1 quick email viewer AND built-in SMTP server designed for development.
It allows developers to safely test email functionality without risk of emails being sent to real recipients.
Features:
- Desktop WPF application for viewing emails
- Built-in SMTP server (receive-only)
- Full email inspection (body, HTML, headers, attachments, raw encoded bits)
- Support for running as a minimized tray application with notifications
- WebView2-based HTML email rendering
