Enquire form Error - The SMTP server requires a secure connection

Question

1.60/5 (2 votes)

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SQL-Server-2008

I need your help.

Can you suggest me which code is wrong.

When i submit some details on contact form then i received a error MSG -

"The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Learn more at"

can you help me... urgent basic ..

below mentioned code -

VB

protected void BtnSubmit_Click(object sender, EventArgs e)
    {
        if (Validation())
        {
            try
            {
                SqlCommand cmd = new SqlCommand("Insert into Enquiry values('" + TextBox1.Text + "','" + TextBox2.Text + "','" + TextBox3.Text + "','" + DropDownList1 .SelectedValue + "','" + TextBox5.Text + "','"+TextBox6.Text +"','"+TxtDegree .Text +"')", con);
                con.Open();
                cmd.ExecuteNonQuery();
                con.Close();
                


SmtpClient client = new SmtpClient();
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.EnableSsl = true;
client.Host = "smtp.gmail.com";          

client.Port = 587;
System.Net.NetworkCredential credentials =
new System.Net.NetworkCredential("xyz@gmail.com",
"*******");
client.UseDefaultCredentials = false;
client.Credentials = credentials;
MailMessage msg = new MailMessage();
msg.From = new MailAddress("xyz@gmail.com");
msg.To.Add(new MailAddress("xyz@gmail.com"));
msg.Subject = "Enquiry";
msg.IsBodyHtml = true;
msg.Body = string.Format("<html><head></head><body>ENQUIRY<BR><hr><br> Name : "+TextBox1 .Text +"<br> Email : "+TextBox2 .Text +"<br> Phone : "+TextBox3 .Text +"<br>Course : "+DropDownList1 .SelectedValue+"<br> Degree :"+TxtDegree .Text +"<br> Message : "+TextBox5 .Text +"</body>");
//msg.Body = string.Format("<html><head></head><body>"+TextBox1 .Text +"</body></html>");
//try
//{
client.Send(msg);
//lblMsg.Text = "Your message has been successfully sent.";
//}
//catch (Exception ex)
//{
//// lblMsg.ForeColor = Color.Red;
//lblMsg.Text = "Error occured while sending your message." +
//ex.Message;

//}
TextBox1.Text = "";
TextBox2.Text = "";
TextBox3.Text = "";
TextBox6.Text = "";
DropDownList1.SelectedValue = "0";
TextBox5.Text = "";
TxtDegree.Text = "";

Label1.Text = "Enquiry submitted!";
}
catch (Exception ex)
{
Label1.Text = ex.Message;
}
}
    }
    protected bool Validation()
    {
        if (TextBox1.Text.Trim() == "")
        {
            Label1.Text = "Enter name!";
            TextBox1.Focus();
            return false;
        }
        if (TextBox2.Text.Trim() == "")
        {
            Label1.Text = "Enter email id!";
            TextBox2.Focus();
            return false;
        }
        if (TextBox3.Text.Trim() == "")
        {
            Label1.Text = "Enter phone no!";
            TextBox3.Focus();
            return false;
        }
        //if (TextBox4.Text.Trim() == "")
        //{
        //    Label1.Text = "Enter course!";
        //    TextBox4.Focus();
        //    return false;
        //}
        if (TextBox5.Text.Trim() == "")
        {
            Label1.Text = "Enter message!";
            TextBox5.Focus();
            return false;
        }
        return true;
    }
    protected void LinkButton1_Click(object sender, EventArgs e)
    {
        Session.Abandon();
        Response.Redirect("Default.aspx");
    }
}

Posted 29-May-14 7:34am

Priyanka Ksyap

Updated 29-May-14 7:39am

v3

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3 solutions

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karthik Udhayakumar · Answer 1 · 2014-05-29T11:54:00

Solution 1

Hello Priyanka,

There are many causes for this to occur,with your code iam unable to identify the issue

You can refer these quickly to try and solve yourself

http://stackoverflow.com/questions/32260/sending-email-in-net-through-gmail[^]

http://stackoverflow.com/questions/18503333/the-smtp-server-requires-a-secure-connection-or-the-client-was-not-authenticated[^]

All the Best:)

Posted 29-May-14 11:54am

karthik Udhayakumar

Comments

Priyanka Ksyap 30-May-14 12:30pm

Thanks, It's solve

karthik Udhayakumar 31-May-14 8:37am

Welcome:)

Animesh Datta · Answer 2 · 2014-05-29T19:08:00

Solution 2

Hello ,
This problem occurs may be for weak password .
Refer link : 5.5.1 Authentication Required with smtp.gmail.com
also check : This

thanks

Posted 29-May-14 19:08pm

Animesh Datta

Member 8726940 · Answer 3 · 2014-05-29T20:39:00

Solution 3

the problem is small password.You have to use a Strong PAssword.

Posted 29-May-14 20:39pm

Member 8726940