eror occure during email sending

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i use the simple mail sending application but the following error occure during sending the mail

The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required.
i use windoes7 and asp.net(c#).

plz help me.

Posted 23-Aug-12 23:25pm

rajuvpatil

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Richard MacCutchan 24-Aug-12 5:40am

That message seems quite clear; the email server does not allow you to send email unless you provide authentication via a userid and password. Edit your question and add the code you are using and someone will probably show you how to fix it.

RAKESH CHAUBEY 24-Aug-12 5:43am

Check Network.Cridential ("Have Correct Email And Password") And Try Debug at what Level You Get this issue . And Paste That Area if yiu cannot paste the Whole Code .

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Vani Kulkarni · Answer 1 · 2012-08-24T00:19:00

Try these links with similar discussions:
http://forums.asp.net/p/1327338/3667481.aspx[^]
http://stackoverflow.com/questions/6477055/the-smtp-server-requires-a-secure-connection-or-the-client-was-not-authenticated[^]
The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required.[^]

Member 9120792 · Answer 2 · 2012-08-24T01:01:00

C#

SmtpClient client = new SmtpClient();
        client.DeliveryMethod = SmtpDeliveryMethod.Network;
        client.EnableSsl = false;
        client.Host = "smtp.gmail.com";
        client.Port = 587;                 // setup Smtp authentication    
        System.Net.NetworkCredential credentials = new System.Net.NetworkCredential("****@gmail.com", "******");
        client.UseDefaultCredentials = false;
        client.Credentials = credentials;
        MailMessage msg = new MailMessage();
        msg.From = new MailAddress("rma.maksat@gmail.com");
     
        msg.To.Add(new MailAddress("prateekfgiet@gmail.com"));
      
        msg.Subject = "New RMA No:'" + DropDownList1.SelectedValue.ToString() + "'";
        msg.IsBodyHtml = true;
        msg.Body = "Status is : '" + DropDownList3.SelectedValue.ToString() + "',      for the Request of RMA No:'" + DropDownList1.SelectedValue.ToString() + "'";
        client.Send(msg);

Sandeep Suryavanshi · Answer 3 · 2012-08-24T04:08:00

C#

using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Data.SqlClient;
using System.Net.Mail;

protected void Page_Load(object sender, EventArgs e)
   {

       String mailMsg = "Hello, "      
       objEmail.To.Add("email@yourdomain.com");
       objEmail.CC.Add("email@yourdomain.com");
       objEmail.From = new MailAddress("email@yourdomain.com", "Company Name");
       objEmail.Subject = "Text mail";
       objEmail.Body = mailMsg;
       objEmail.IsBodyHtml = true;
       objEmail.Priority = MailPriority.High;
       SmtpClient smtp1 = new SmtpClient();
       smtp1.Host = "relay-hosting.secureserver.net";
       smtp1.UseDefaultCredentials = false;
       smtp1.EnableSsl = false;
       try
       {
           smtp1.Send(objEmail);
           objEmail.Dispose();
           objEmail = null;

       }
       catch (Exception exc)
       {
           
           string msg = exc.Message;
           
       }
}

eror occure during email sending

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