User-agent: Yandex
Disallow: /linker/
Disallow: /mail/
Disallow: /form/

User-agent: Googlebot
Disallow: /linker/
Disallow: /mail/
Disallow: /form/

User-agent: Aport
Disallow: /linker/
Disallow: /mail/
Disallow: /form/

User-agent: StackRambler
Disallow: /linker/
Disallow: /mail/
Disallow: /form/

User-Agent: *
Disallow: /linker/
Disallow: /mail/ 
Disallow: /form/