Software · Internet & communication

Papercut SMTP

Standalone SMTP server designed for viewing received messages.

Completely free
Windows
Open source
No account

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Completely freeconfirmed by Winget (Windows Package Manager)
License: Apache-2.0 — Open source (permissive)confirmed by Winget (Windows Package Manager)
Open source: Yes
Commercial use: Yesconfirmed by Winget (Windows Package Manager)
Account required: Noconfirmed by Winget (Windows Package Manager)
Credit card required: Noconfirmed by Winget (Windows Package Manager)
Watermark: Not applicable
Ads: not documented
Platforms: WindowsEstablished by Windows: Winget
Publisher: Changemaker Studios
Latest version: 8.0.2
Source code: github.com/changemakerstudios/papercut-smtp

Overview

Features described in its GitHub repository and in its Winget manifest: web interface and attachments.

Services and protocols mentioned: SMTP.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information

“Desktop tray app and web UI for viewing emails” — Winget, 10 November 2026
“The Papercut Service includes an optional Model Context Protocol server, so AI agents like Claude Code can inspect the email your app sends — list messages, assert on bodies and headers, verify attachment content,…” — GitHub, 10 November 2026

At a glance

Papercut SMTP is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (Apache-2.0) is a permissive open source licence: use, modification and redistribution are allowed, including in commercial projects.

Strengths

Open source code
No account needed
Commercial use allowed

Sources and checks

Facts collected from Winget (Windows Package Manager) (credit card, account, source code, publisher, licence, free status, platforms, commercial use, version) — 9 November 2026
Last technical check: 7 November 2026
Description from github.com — Manifeste Winget (MIT)

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