|Open Relay Test
||Think your mail server simply can't be a mail relay? Test it here.
||Laboratory for the Processing of Analog and Digital Signals
|DNS Blacklists Check
||Is your mail server running? Somebody, somewhere has probably black listed it.
|External Sender Test
||Does your current mail server/firewall config allow incoming 100% Compliant SMTP?
|Domain Name Service And Other IP Tools
||Checks your authoritative nameserver, your list of secondary nameservers, and email delivery. Includes a batch mode, too.
||Detects the most common errors in DNS zones, and points you to the solutions.
||Make sure your DNS servers are properly configured... especially those MX records.
||Men and Mice
|Internet Query Tools
||Track down suspicious domains... and don't forget to report them.
|IP Address Calculators
||Subnet Mask, Network/Node, IP Address Converter, more.
|Subnet Cheat Sheet
||Subnet Mask, Guide to Sub-Class C Blocks. CIDR Notation.
||Brian Aker's World
||How many routers between the world and you? How fast? How accessible?
|Whois and Reverse IP
||Search by IP address, domain name, even partial name.
|Open Relay Advisory
||Check the open relay status of your SMTP mail server.
|Security Vulnerability Database
||Current software vulnerability advisories.
|Global Virus Watch
||Up-to-the-minute virus outbreak reports.
||trimMail's Email Battles
|Internet Health Report
||Is it you or the Internet? Check Internet traffic between major broadband trunks.
|Internet Traffic Report
||Check the flow of data around the world. Score of 100 is best.
|Firewall Port Scan Watch
||Who's knocking on your firewall's door? Track exploit and virus trends worldwide.
||SANS Internet Storm Center
|DNS Daily Changes
||Number of .COM, .NET, .ORG, .INFO, .BIZ, .US, .WS domains transferred today. Who won, who lost.
|Miscellaneous Email Management Tools
|Regular Expression Test
||Check regular expressions before inflicting them on your trimMail Inbox.
||Northern Virginia Community College
|Find Business or Residence
||Track down a business or residential address by city/state or phone. Search within xx miles.
|FBI Internet Fraud Complaint Center
||File Internet-based complaints with the FBI.
||US Federal Bureau of Investigation
|FTC Spam Complaint Form
||Unsolicited Commercial E-mail Complaint Form. Or forward spam to UCE@FTC.GOV.
||US Federal Trade Commission
|Social Security Fraud Form
||Tell Social Security your number was stolen.
||US Social Security Administration