I have IIS 3 version 4 running on an NT 4.0 server. I also have Exchange 5.5 with Internet Mail Service running on the same computer but installed after IIS3 was installed. I tried upgrading to 4.0 but it would not install the SMTP service since I had Exchange 5.5 installed and running IMS. I can not send email from the Internet because of this. I found out that CDONTS is dependant on the IIS SMTP. Does anyone please have a work around? I've even hired someone from Ask the Experts and he only sent me here for answers. And from what I see here, I don't see an answer for me.