Yes, all mail coming into No-IP.com‘s network is scanned for viruses and spam. We also have block lists available that can be applied to email coming in for your domain.

By default, spamhaus.org, barracuda, spamcop, and SORBS are used as well as greylisting. For POP3 Email, spam tagging is also applied. No-IP.com is continually tweaking and adding to their email tools to give you the best possible protection against spam and viruses.

Links: 

 http://www.spamcop.net/

 http://www.spamhaus.org/

 http://www.sorbs.net/

 http://www.barracudacentral.org/rbl

 http://projects.puremagic.com/greylisting/