This component is part of the IP Works Enterprise ASP.NET Component Library.

The MX component enables querying of mail exchange (MX) records from a Domain Name Server (DNS). That is, it will find out the name(s) of the mail server(s) accepting email for a given email address or domain.

NOTE: What follows is a very short description of the component interfaces. For more information, please consult the help files that come with the respective package.

Remarks
The component will attempt to automatically determine the name of a DNS server from the system settings or from the value of the DNSServer property.

The component operates in synchronous or asynchronous mode, depending on the value of the Timeout property. Assigning an email address or domain name to the EmailAddress property directs the component to query the DNSServer. The Response event is fired for each server that handles mail for the email address. The component will fill out the MailServer property with the most preferred mail server and the Status property to "Ok" or an error message.

The RequestId property may be used to identify requests and is used in the Response event. The user may set its value before sending out requests, and then match the responses to the request using the RequestId parameter in the Response event.

More Information: http://www.nsoftware.com/products/component/mx.aspx