DNS MX Wizard is an ActiveX control that lets you query a Domain Name Sistema (DNS) server for Mail Exchange(MX) Resource Records(RR). MX RR's contain the name of the server responsible for handling mail for a domain. Multiple resource records can exist for any server and each record has an associated preference level with it which lets you determine which server to try and communicate with first. This control has many uses, here are some: You can write your own SMTP Server and use this to lookup where to deliver the mail. Verify Correo electrónico addresses by looking up the domains MX record and verifying the Correo electrónico address with the mail server for the domain. Verifying and watching to make sure your companies MX records are correct and haven't been "hacked". The control gives you complete control over the data by letting you access all the returned MX server, their preference level and automatically giving you the preferred server. The control automatically detects the local machines DNS server and also allows you to set your own DNS server to use for the lookup. This control works with any ActiveX container. It even works in ActiveX scriptable languages such as VBScript.