Sender Verification (Chapter 12)

Active Spam Killer (ASK)

Camram, proof of work, electronic signature, CRM114 interface

checkpassword-pam, an implementation of checkpassword-compatible authentication program

EmailRelay SMTP proxy and store-and-forward MTA

Hashcash Proof of work web site

NormalizeMIME, a MIME email message parser

Python language home

Tagged Message Delivery Agent (TMDA) home

TMDA Web interface

TRE regular expression matching library

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