X-Sig: An Email Signing Extension for the Simple Mail Transport
Protocol (SMTP)
X-Sig is:
- A way to know exactly who is sending you email
- A way to reduce/eliminate spam email
- Spammers rely on open relays
and invalid return email addresses to generate spam
- If you could verify exactly where an email is coming from, spamming
would no longer be an anonymous practice
X-Sig is NOT:
- An email protection mechanism (encrypt the message
itself)
- Creating something that is complicated
- Creating something that is not backwards-compatible with everything
out there today
Documentation
Postfix Signing Implementation
Automated signing has been implemented as a Postfix filter.
The Postfix implementation requires Python 2.3 or greater and OpenSSL. See the installation
guide for details.
Prototype Implementation
Contact
X-Sig and the X-Sig prototype was conceived and written by Robert Rose, rose @.@
cafwap.net.
Copyright (c) 2004 Robert Rose
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