Send Email using ASP.NET with C# with SMTP gmail Server

• Create new ASP.NET website with simple design as follows 
• Four Lables : lblName, lblEmail, lblKey, lblComment
• Four Textboxes : txtName,  txtEmail, txtKey and txtComment
• A button : btnSubmit

        The design would look as below. (In this design  TextBoxWatermarkExtender is used )

• Add a class 'clsSend_Email' to your website code as follows

using System.Net.Mail;

public class clsSend_Email

{

     public clsSend_Email()

     {

     }

    public string Send_Email(string ToMail,string fromMail,string  

    SubjectMail,string BodyMail)

    {

        try

        {

            MailMessage mmSubmit = new MailMessage();

            mmSubmit.To.Add(ToMail);

            MailAddress maFrom = new MailAddress(fromMail);

            mmSubmit.From = maFrom;

           

            mmSubmit.Subject = SubjectMail;

            mmSubmit.Priority = MailPriority.Normal;

            mmSubmit.Body = BodyMail;

           

            SmtpClient sc = new SmtpClient("smtp.gmail.com", 587);

            //we will send email using gmail smtp server

            sc.Credentials = new System.Net.NetworkCredential("loginid",             "password");

                       

            //   loginid and password would be login id and password

            //   for your gmail account (from Email)

            sc.EnableSsl = true;

            sc.Send(mmSubmit); 

            return string.Empty;

        }

        catch (Exception ex)

        {

            return ex.Message;

        }

   

    }

}

• On button click event of submit button, call Send_Email method from class clsSend_Email

protected void btnSubmit_Click(object sender, EventArgs e)

    {

        //Send Email

        try

        {

            clsSend_Email email = new clsSend_Email();

            string Subject="New Email from "+txtName.Text+" regarding "+txtKey.Text.Trim()+" 

            EmailID : "+txtEmail.Text.Trim();

            string mailStatus= email.Send_Email("From Email ID here ",                
            txtEmail.Text.Trim(),Subject,txtComment.Text.Trim());

            if (mailStatus == string.Empty)

            {

                lblErrMSG.Text = "Thank You for your response!";

            }

            else

            {

                lblErrMSG.Text = mailStatus;

            }

        }

        catch (Exception ex)

        {

           

            lblErrMSG.Text = ex.Message;

        }

       

    }

• Run and Execute application