# Papercut SMTP (open-source desktop app)

> Papercut SMTP is a free, open-source desktop app for Windows. Papercut SMTP -- The Simple Desktop Email Server. It has 3,339 GitHub stars and is released under the Apache-2.0 license. Its source code is on GitHub at ChangemakerStudios/Papercut-SMTP.

Papercut SMTP is a 2-in-1 quick email viewer and built-in SMTP server for development. Point your application at localhost:25 and every email it sends is caught, displayed instantly, and never delivered anywhere — body, HTML, headers, attachments, and raw bits included.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/ChangemakerStudios/Papercut-SMTP |
| Platforms | Windows |
| Interface | desktop GUI |
| GitHub stars | 3,339 |
| License | Apache-2.0 (open source) |
| Replaces | n/a |
| Language | C# |
| Website | none listed |
| Official | no |
| Category | Other |
| Latest release | 7.8.0 (Aug 15, 2026) |
| Last commit | Sep 27, 2026 |

## Install

### winget (Windows)

```sh
winget install ChangemakerStudios.Papercut-SMTP
```

Package page: https://winstall.app/apps/ChangemakerStudios.Papercut-SMTP

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