2. ? . - , , , Usenet, ICQ, SMS, , . 3. , , . , , , , , , , . ,
. 4. , . . . , . 5. , , , , , . 6. , , , , .. 7. , , , . 8. . 9. (
junk mail ) , , . , , . - Reverse DNS Check, Open Relay Check,
email messages limit, DNS block lists, gray lists, SPF (Sender
Policy Framework), SMTP tarpits, email traps . , . / . 10. , - , .
, , , , . , captcha . , . . 11. WHAT IS SPAM?
https://www.youtube.com/watch?v=apCdjFIacfU 12. !
