User-agent: *  
Disallow: /feed/ 

User-agent: *  
Disallow: */feed/ 

User-agent: *  
Disallow: */feed/$

User-agent: *  
Disallow: /comments/feed/

User-agent: *  
Disallow: */comments/feed/ 

User-agent: *  
# BEGIN XML-SITEMAP-PLUGIN
Sitemap: http://www.marathon-blog.de/sitemap.xml
# END XML-SITEMAP-PLUGIN