This is the only offered solution which can provide this functionallity, this component extract all MX records of certain doman. MX record is the address of email server.
Without this component, you have to get the records manually using nslookup utility, or using some free web service like zonedit, put you cannot integrate it with your code.
Retrieve all MX records of provided domain
This component uses windows sockets and do not need any other software like Internet Explorer, Outlook, Windows Server...
See also: ActiveX, Component, Resolver, MX Record