March 2005
January 2005

http://www.sendmail.net/tools/Sendmail_Auth_Reco_wp_jp.pdf
送信者認証技術の導入におけるレコメンデーション
Maia Mailguard: ホームページ
スパム/ウィルス管理システム
December 2004
Yahoo! Anti-Spam Resource Center - DomainKeys
DomainKeys: Proving and Protecting Email Sender Identity
November 2004
Pyzor
Pyzor is a collaborative, networked system to detect and block spam using identifying digests of messages.
SecureMail - pukiwiki自宅サーバー構築メモ
spamassassin
1
(21 marks)