Research

http:/ / www.dnsreport.com/
This site will provide you with a DNS report for your domain. A very large percentage of domains have DNS problems; this site will help you find those problems and fix them. Also, the "Mail Test" tool will help find mail delivery problems for your domain.

http:/ / www.dnsstuff.com/
Lots of friendly DNS tools. spam database lookup, WHOIS, Email test, IP routing and more.

http:/ / www.pgts.com.au/ pgtsj/ pgtsj0208d.html
If you wish to find out more about a robot, or update the details click on the robot name.

http:/ / samspade.org/
SamSpade is both a windows application and a website that allow you to: ping, nslookup, whois, IP block, whois, dig, traceroute, finger, SMTP VRFY, web browser, keep-alive, DNS zone transfer, SMTP relay check, Usenet cancel check, website download, website search, email header analysis, Email blacklist query, Abuse address query, S-Lang scripting & Time.

http:/ / www.senderbase.org/ search
SenderBase is an email reputation service designed to help email administrators research senders, identify legitimate sources of email and block spammers. You are viewing a report on the top senders of email on the Internet based on data provided from over 9,000 organizations that receive email.

http:/ / directory.google.com/ Top/ Computers/ Internet/ Abuse/ Spam/ Blacklists/
Make sure your mail server is not an open relay and find out if you are on any of these blacklists

http:/ / www.whois.sc/
Domain name search lookup that allows a wildcard search of all current/deleted/expired whois domains.