Problem with the contact form page. Displays below Once you click the send button .

A socket operation was attempted to an unreachable host 74.125.193.108:587
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Net.Sockets.SocketException: A socket operation was attempted to an unreachable host 74.125.193.108:587

Source Error:

Line 32: smtp.Credentials = NetworkCred;
Line 33: smtp.Port = 587;
Line 34: smtp.Send(mm);
Line 35: lblMessage.Text = "Email Sent SucessFully.";
Line 36:

Source File: d:\hshome\c311399\onthegoventuresng.org\Contact.aspx.cs Line: 34

Please any help ?

Apparently, your specified host is unreachable or rejecting your connection. What server is that? Your own?

Or, the network where this web server is located on is not allowing connections to a remote host at all or on that port. gmail mail server?

This is what is on my front page. It is still bring the error below

ERROR MESSAGE

Server Error in '/' Application.

A socket operation was attempted to an unreachable host 74.125.193.108:587
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Net.Sockets.SocketException: A socket operation was attempted to an unreachable host 74.125.193.108:587

Source Error:

Line 32: smtp.Credentials = NetworkCred;
Line 33: smtp.Port = 587;
Line 34: smtp.Send(mm);
Line 35: lblMessage.Text = "Email Sent SucessFully.";
Line 36:

Source File: d:\hshome\c311399\onthegoventuresng.org\Contact.aspx.cs Line: 34

Stack Trace:

[SocketException (0x2751): A socket operation was attempted to an unreachable host 74.125.193.108:587]
System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress) +251
System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Int32 timeout, Exception& exception) +279

[WebException: Unable to connect to the remote server]
System.Net.ServicePoint.GetConnection(PooledStream PooledStream, Object owner, Boolean async, IPAddress& address, Socket& abortSocket, Socket& abortSocket6, Int32 timeout) +6136880
System.Net.PooledStream.Activate(Object owningObject, Boolean async, Int32 timeout, GeneralAsyncDelegate asyncCallback) +314
System.Net.PooledStream.Activate(Object owningObject, GeneralAsyncDelegate asyncCallback) +21
System.Net.ConnectionPool.GetConnection(Object owningObject, GeneralAsyncDelegate asyncCallback, Int32 creationTimeout) +322
System.Net.Mail.SmtpConnection.GetConnection(ServicePoint servicePoint) +146
System.Net.Mail.SmtpTransport.GetConnection(ServicePoint servicePoint) +222
System.Net.Mail.SmtpClient.GetConnection() +50
System.Net.Mail.SmtpClient.Send(MailMessage message) +1496

[SmtpException: Failure sending mail.]
System.Net.Mail.SmtpClient.Send(MailMessage message) +1829
Contact.btnSend_Click(Object sender, EventArgs e) in d:\hshome\c311399\onthegoventuresng.org\Contact.aspx.cs:34
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +118
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +112
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1022

Contact.aspx page

   **Contact.aspx.cs page**

   using System;
using System.Collections.Generic;
using System.Web.UI.WebControls;
using System.Net.Mail;
using System.Net;

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

    }

    protected void btnSend_Click(object sender, EventArgs e)
    {
        MailMessage mm = new MailMessage("xxx@gmail.com", "info@onthegoventuresng.org");
        mm.Subject = txtSubject.Text;
        mm.Body = "Name: " + txtName.Text + "<br /><br />Email: " + txtEmail.Text + "<br />" + txtBody.Text;
        if (FileUpload1.HasFile)
        {
            string FileName = System.IO.Path.GetFileName(FileUpload1.PostedFile.FileName);
            mm.Attachments.Add(new Attachment(FileUpload1.PostedFile.InputStream, FileName));
        }
        mm.IsBodyHtml = true;
        SmtpClient smtp = new SmtpClient();
        smtp.Host = "smtp.gmail.com";
        smtp.EnableSsl = true;
        System.Net.NetworkCredential NetworkCred = new System.Net.NetworkCredential();
        NetworkCred.UserName = "xxx@gmail.com";
        NetworkCred.Password = "xxx";
        smtp.UseDefaultCredentials = true;
        smtp.Credentials = NetworkCred;
        smtp.Port = 587;
        smtp.Send(mm);
        lblMessage.Text = "Email Sent SucessFully.";

        txtName.Text = "";
        txtEmail.Text = "";
        txtBody.Text = "";
    }
    private void Exit(int p)
    {
        throw new NotImplementedException();
    }



}







<div class="col-sm-9">

    <h4>For all your Request Please fill Form Below</h4>
      <table border = "0" style="width: 409px">
    <tr>
        <td>
            <asp:Label ID="Label1" runat="server" Text="Name*"></asp:Label><br />
        </td>
        <td>
            <asp:TextBox ID="txtName" runat="server" ValidationGroup = "contact"></asp:TextBox><br />
            <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="*"
             ControlToValidate = "txtName"></asp:RequiredFieldValidator>
        </td>
    </tr>
    <tr>
        <td>
            <asp:Label ID="Label2" runat="server" Text="Subject*"></asp:Label><br />
        </td>
        <td>
            <asp:TextBox ID="txtSubject" runat="server"></asp:TextBox><br />
            <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ErrorMessage="*"
             ControlToValidate = "txtSubject"></asp:RequiredFieldValidator>
        </td>
    </tr>
    <tr>
        <td>
            <asp:Label ID="Label3" runat="server" Text="Email*"></asp:Label><br />
        </td>
        <td>
            <asp:TextBox ID="txtEmail" runat="server"></asp:TextBox><br />
            <asp:RegularExpressionValidator id="valRegEx" runat="server"
            ControlToValidate="txtEmail"
            ValidationExpression=".*@.*\..*"
            ErrorMessage="*Invalid Email address."
            display="dynamic">
            </asp:RegularExpressionValidator>
            <asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ErrorMessage="*"
            ControlToValidate = "txtEmail"></asp:RequiredFieldValidator>
        </td>
    </tr>
    <tr>
        <td valign = "top" >
            <asp:Label ID="Label4" runat="server" Text="Body*"></asp:Label>
        </td>
        <td>
            <asp:TextBox ID="txtBody" runat="server" TextMode = "MultiLine" ></asp:TextBox><br />
            <asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" ErrorMessage="*"
            ControlToValidate = "txtBody"></asp:RequiredFieldValidator>
        </td>
    </tr>
     <tr>
        <td></td>
        <td>
            <asp:FileUpload ID="FileUpload1" runat="server" />
       </td>
    </tr>
    <tr>
        <td></td>
        <td>
            <asp:Button ID="btnSend" runat="server" Text="Send" OnClick="btnSend_Click" />
       </td>
    </tr>
    <tr>
        <td></td>
        <td>
            <asp:Label ID="lblMessage" runat="server" Text="" ForeColor = "Green"></asp:Label>
       </td>
    </tr>
</table>
    </div>

Shouldn't

smtp.UseDefaultCredentials = true;

be:

smtp.UseDefaultCredentials = false;

i corrected that and it still giving the same error

Not sure then, check your firewall.

I tried it on another system it still brings that error

This is my web config file and i am using a visual studio 2012 versio

    <?xml version="1.0"?>



    <configuration>

        <system.web>
          <customErrors mode="Off"></customErrors>

        <compilation debug="true"></compilation>

        </system.web>



      <appSettings>
          <add key="ValidationSettings:UnobtrusiveValidationMode" value="None" ></add>
        </appSettings>

    </configuration>

I tried it on another system it still brings that error

Firewall somewhere else then? Something is blocking the port, at least looks like it.

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