User-agent: *
Crawl-Delay: 2
User-agent: MJ12bot 
Disallow: / 
User-agent: dotbot 
Disallow: /
User-agent: spbot
Disallow: /
User-agent: Speedy 
Disallow: /
User-agent: search17
Disallow: /
User-agent: twiceler
Disallow: /
User-agent: Exabot
Disallow: /