Configure SMTP and install CDONTS for email sender component

CDONTS was deprecated by Microsoft as email sender component for Windows 2003, replaced by CDOSYS but some ASP scripts still require CDONTS. This tutorial will show you how to install CDONTS and configure MS IIS6 SMTP service to relay email send by ASP scripts.

Download CDONTS here

Extract the cdonts.dll and place it under C:\WINODWS\system32 along with cdosys.dll

Click Start >> Run and type in regsvr32 c:\windows\system32\cdonts.dll to register this component

succeeded register cdonts.dll component

Open IIS console right click on Default SMTP virtual service and go its properties

assign the ip address for MS SMTP service and also enable logging then click advanced button

set the port number: if you use another email server software other than the default MS smtp and pop service (since the MS smtp and pop service is not an ideal email soultion) set the port to any number to any other number beside 25.

click on Access tab and go to Authentication

uncheck the Anonymous access and check to use Integrated Windows Authentication to prevent anonymous user from using MS smtp service to send out spam

now we need to set the permission for mailroot folder in order for ASP to create and send out email, open Windows Explorer and go to c:\Inetpub and right click on mailroot folder and go to its properties

click on the security tab and click add button, we going to add IUSR_machine account to give it access to mailroot folder

type in the IURS_machine account, in my case my server name is Austin

Click on IUSR_machine account (Internet Guest Account) and uncheck any other permission and give it only write permission

That's it!