Javascript to send email without using 3rd party service?

Hi Experts,

I am wondering whether there is a way to write JavaScript code to send email:
1. using known smtp information
2. neither letting user input username/password, nor hard codeing them in the JavaScript
3. not using 3rd party service

I couldn't make it because of the security, but just want to make sure whether there is a way to do that? If there is, how?
Assuming there computer account currently loged in can access email application, can it be use?
Thank you!