We have a interesting thing that we are noticing. Some of our clients have Exchange 2003 server running and all is well however, they were having issues looking up some domains. for some reason when email would not go to Hotmail, AOL, and a couple of other places. We had to change their Forwarders (on The Master DNS) to use Sigicoms DNS Servers. (They were using SBC and AT&T). The other side of the issue was, we had a customer that we helped migrate to Exchange 2003 from a 5.5 system. When it was Ex 5.5 it was working well, they could send email to AOL, Yahoo, and Hotmail. After we changed them to Exchange 2003, it would not send to AOL, Yahoo, or Hotmail. The only fix that we have come across is to change their DNS forwarders to Sigicoms DNS servers. Anyone have any ideas ? Thank you, Scott Van Singel MCSE, MCP Network Engineer / Consultant Keller Schroeder & Associates Phone: (812) 474-6825 Ext. 378 Email: Svansingel@xxxxxxxxxx