User-agent: *  
Disallow: /registration
Disallow: /under_construction
Disallow: /account
Disallow: /password
Disallow: /redirect

User-agent: Yandex
Disallow: /registration
Disallow: /under_construction
Disallow: /account
Disallow: /password
Disallow: /redirect
Host: www.mega-mir.com

User-agent: Mediapartners-Google*
Disallow: