Project Summary
The Simple Desktop Email Receiver
Ever need to test emails from an application, but don't necessarily want it sending them out? Don't want to hassle with pointing it to a physical SMTP server? All you want to is verify it can send email, and take a look at the message.
Papercut is the answer. Papercut is a simplified SMTP server designed to only receive messages (not to send them on) with a GUI on top of it allowing you to see the messages it receives. It doesn't enforce any restrictions on addresses, it just takes the message and allows you see it. It is only active while it is running, and if you want it in the background, just minimize it to the system tray. When it receives a new message, a balloon message will show up to let you know.
In a Nutshell, Papercut SMTP...
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has a well established, mature codebase
maintained by a average size development team
with stable Y-O-Y commits -
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took an estimated 10 years of effort (COCOMO model)
starting with its first commit in October, 2009
ending with its most recent commit 5 months ago
Apache License 2.0
Permitted
Commercial Use
Modify
Distribute
Place Warranty
Sub-License
Private Use
Use Patent Claims
Forbidden
Hold Liable
Use Trademarks
Required
Include Copyright
State Changes
Include License
Include Notice
These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
There are no reported vulnerabilities
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
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30 Day SummaryJul 25 2025 — Aug 24 2025
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