Finer Technologies http://www.email-screen.com email@example.com 866-FIN-TECH As webmasters and database administrators struggle to keep email address databases clean, web site form validation becomes key. At this point, the state of email address validation is poor. In order for web business to be as efficient as possible, it has now become necessary for a base competitive level of email validation technology. With the recent innovations and use of web site developer components, this email validation technology is now a turnkey solution. Please visit us at http://www.email-screen.com for more information. The Email Address Validation Hierarchy Difficult due to -Different server operating Absolute systems Validation -Security Address is fully considerations functional EmailScreen Base MX Domain Level Validation competitive Address’ domain must be able to level. receive Internet email. Too General Base Domain Level Validation Address’ domain must be an existing Internet domain name Base Level Validation Address must contain “@” and “.com, .net, .org” Easily Defeated Validation Quality Notes on Levels of Validation Base Level Validation - This is the type of email validation that most current web sites use. This is extremely inadequate and needs to be upgraded. The reason that most sites use this method is that it is easy to code. Base Domain Level Validation – This email validation is a step up from Base Level Validation, but still extremely inadequate. This level of validation only requires that the domain name of the email address be a valid registered domain. Many domain names are registered but cannot receive email. Additionally, the majority of registered domain names are not currently active mail servers. MX Domain Level Validation – This email validation is currently the highest feasible level. It is not 100% foolproof, but is a marked improvement over any lower form of validation. This level guarantees that the domain name of the email address is not only registered, but also that it is a live Internet host that can actually receive email. This is the base competitive level of email validation. Absolute Validation – This is a theoretical level of email address validation. In this level, email addresses could be validated with 100% accuracy. Currently, this is nearly impossible to achieve. Internet servers run various operating systems which handle email in various ways. Additionally, due to security considerations, many operating systems are configured in such a way that specific email account validation is impossible. Although this is theoretically the best, it is functionally impossible.