Very usefull free on-line tools and services. Netcraft This is a handy site for getting information on website and web servers Quick Check Nice site for testing the state of you domain A and MX records RIPE NCC Homepage European IP address registry Sender Policy Framework Anti Span ans security solution Symantec Security Free check As it's says!  traceroute.org It you ever wondered how the information got from A to B! Trend Micro - Free online virus Scan Again , as it says. DNS Report   Another good site for getting feed back on your domain DNS Stuff DNS tools, WHOIS, tracert, ping, etc. Great on line IP tools DomainSurfer  Want to find a good domain, well this will definatly help. IP-Plus A good on line free DNS dig tool mail2web Get yur POP email anyhwere. Mail relay testing Make sure your email server is not a spammers hide out!