Where to find a list of email spiders to add to my robots.txt

Need to identify the email spiders then zap'em!

[Web Footed Newbie]

Is there a list somewhere of email spiders so I can zap them in my robots.txt file?
Thanks,
Web Footed Newbie :)

[hurlimann]

webmasterworld.com/robots.txt

[EliteWeb]

Thats asuming that e-mail spiders follow your robot.txt. Email spiders are not made to be nice, their made to snag emails, so basicly you have to know their user agents and have yer web server reject them upon identification.

[jatar_k]

it is a big read but you may want to look at this

close to perfect .htaccess ban list [webmasterworld.com]