Similar to 特定電子メールの送信の適正化等に関する法律

Google Penguin

Sender ID

Apache SpamAssassin

Instant messaging#Review of products

Authenticated Received Chain

Opt-in email

Keyword stuffing

Spamdexing

Spam (Monty Python sketch)

Email authentication

Twitter bomb

Email filtering

Doorway page

Trackback

Backscatter (email)

Voice phishing

Email spam

Email marketing

Link farm

Word salad

Network security

ALTQ