Hallo 
seems the IP (88.87.44.66) has one block here http://whatismyipaddress.com/blacklist-check
listed at l2.apews.org
som info posted there http://whatismyipaddress.com/blacklist/apews
Whatismyipaddress.com does not recommend the usage of this blacklist. [b]It has the potential to block large segments of IP addresses. [/b] If you are listed with them it is generally not a problem.
so maybe this is why?