I want to send an email using authentication through my 10.4 tiger mailserver.

It is not hard to enable smtp / login using the Server Admin, but it is not clear how it gets it LOGIN information.

Using the Workgroup Manager I do not see an option to allow users to enable / disable them SMTP access.

I want only ONE special account to be able to send mails through an PHP script from the outside. All outside relaying is disabled, Internal relay is mostly disabled, except for some ip-ranges.

So can some one tell me how SMTP / LOGIN gets its ACCOUNT information and/or I can enabl /disable users if it gets it from Workgroup Manager.