>we are using Netscape Messaging Server 3.5
>we are now attracked by some hacker using unathorzation use of our e-mail server SMTP service to sent mail bomb to other .
>is there any way to disable the SMTP open relay security hole .
>I know that it can add a script to the server .
>but due to the worst documnetation of the script .
>I don't know which command can add to the script to prevent the "Open relay"
>is there any example of those script ?
>Our server is now black listed by those security org .
>so we now can sent ant email to any Public mail server (yahoo , hotmail )
>is there any people know how to do ?

Each SMTP server should allow you to apply restriction on the relay. Basically, you enter the domains you wish to agree to send mails.