Read dns:// question

Greetings Rebols: I find that a quick way to test for the existance of a domain is to do a read dns. Example: read dns://johnsons-web.com == 12.24.138.43 Are there any caveats to using this method? FYI, I would be using this method to do a test on an email address (for an authentic domain) in an on-line transaction via cgi. TIA -- Tim Johnson <[tim--johnsons-web--com]> http://www.alaska-internet-solutions.com http://www.johnsons-web.com