Pyzor is a collaborative, networked system to detect and block spam using
identifying digests of messages.
Pyzor initially started out to be merely a Python implementation of Razor, but
due to the protocol and the fact that Razor's server is not Open Source or
software libre, I decided to impelement Pyzor with a new protocol and release
the entire system as Open Source and software libre.
Since the entire system is released under the GPL, people are free to host their
own independent servers. Server peering is planned for a future release.

Authors:
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Frank Tobin
and others (see THANKS file)