all i used was one of the commands given to me at the beginning.
in your original dialog you issued the auth login command, the response to that was:
334 VXNLcm5hbWU6
which is the username prompt. it was expecting a response rather than another command.


how do i have the ability to login? all i have is something that says username: is that like a backdoor?
not a backdoor - just an authentication mechanism. it's no different in purpose than say BASIC authentication on a web server. it simply identifies you as a user on the system.


all you would need would be a username/password to shutdown the mail sending completly? that seems like a hazard
as far as i know there are not any official management commands available through esmtp. although, i'm sure someone has implemented it somewhere. the reason for requiring a username and password are not to manage the service but to be able to send mail through it. in this way unauthorized user's can't use the service for spam or relaying purposes.