Problem in using mail Function in asp.net

I' m unable to detect the error , the code below always shows the exception message......
I'm attatching the code below....
Ucomplain.aspx.cs
Ucomplain.aspx
Sukesh ShuklaAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

David Johnson, CD, MVPOwnerCommented:
The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required.

Unless you know that the user uses gmail and you know their username and password you can't send as them you will be sending from your website assuming this is to your support desk to the from and to will be hard coded.
The flat # and the Tenants name can be in the subject and you can cc: the tenant
using System;
using System.Linq;
using System.Net;
using System.Net.Mail;

public partial class Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void Button2_Click(object sender, EventArgs e)
    {

    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        try
        {

            var messagefrom = TextBoxPME.Text;
            var toAddress = "nidhi@indweb.com";
            string messageBody = TextBoxD.Text;
            const string fromPassword = "Password";
            var subject = "Subject";
            var client = new SmtpClient
            {
                Host = "smtp.gmail.com",
                Port = 587,
                EnableSsl = true,
                DeliveryMethod = SmtpDeliveryMethod.Network,
                UseDefaultCredentials = false,
                Credentials = new NetworkCredential(messagefrom, fromPassword)
            };

            using (var msg = new MailMessage(messagefrom, toAddress)
            {
                Subject = subject,
                Body = messageBody
            }
            )

            {
                client.Send(msg);
            }
            Response.Write("mail send");
        }

        catch (Exception ex)
        {
            Response.Write(ex.Message);
        }
    }
}

Open in new window

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
.NET Programming

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.