About Papercut SMTP
Papercut SMTP is a development tool that combines a receive-only SMTP server with a desktop email viewer. Developers can configure applications to send test messages to the local server, then inspect the resulting emails without risking delivery to real recipients. The viewer can display message bodies, HTML, headers, attachments, and raw encoded content. It can run minimized in the system tray and provide notifications when messages arrive. HTML email is rendered through WebView2. This makes the tool useful for testing email generation and reviewing the full structure of a message during development. Papercut SMTP is designed for safe local email testing rather than production mail delivery. Its server receives messages but is not described as sending them onward. The evidence establishes detailed inspection and tray notifications, while configuration and compatibility requirements remain unspecified.
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