Penny Post is a system to combat spam emails by making the sender "pay for email" by spending a few seconds of computing time. Outgoing mail is marked with postage stamps that convince the receiver that the sender is genuine.

Project Samples

Stamp information window A stamped email message

Project Activity

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Categories

Email, Security

License

GNU Library or Lesser General Public License version 2.0 (LGPLv2), GNU General Public License version 2.0 (GPLv2)

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  • jonasaoestman Posted 2010-04-29
    It really works! Please begin develop this Add-on again!
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Additional Project Details

Operating Systems

Linux, Windows

Languages

English

Intended Audience

End Users/Desktop

User Interface

Command-line, Plugins

Programming Language

JavaScript, Java

Related Categories

JavaScript Email Software, JavaScript Security Software, Java Email Software, Java Security Software

Registered

2007-07-30
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