想要发送来自asp.net网站的自动邮件

I am trying to send an automatic mail from my asp.net website whenever a person will click submit button to enter some value. I have created some codes in C#. It's not showing any error, but also not sending any mail. I am using ip address of the mail server of the organization in the network credential. I am not sure how to provide password for the email address I am using to send mail. I am sharing my code with you. I am trying to send an automatic mail from my a