Email Sending in ASP.net 2.0

<asp:RegularExpressionValidator ID="REVUserEMail" runat="server" CssClass="redtext"

Display="static" ControlToValidate="txtemailto" ErrorMessage="Enter valid Email Address"

ValidationExpression="\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"></asp:RegularExpressionValidator>

</td>

</tr>

<tr>

<td width="10%" align="right">

<asp:Label ID="lblcc" runat="server" Text="CC:"></asp:Label>

</td>

<td align="left" width="90%">

<asp:TextBox ID="txtemailcc" Width="50%" runat="server" TabIndex="10"></asp:TextBox>

</td>

</tr>

<tr>

<td width="10%" align="right">

<asp:Label ID="lblBcc" runat="server" Text="BCC:"></asp:Label>

</td>

<td align="left" width="90%">

<asp:TextBox ID="txtemailbcc" Width="50%" runat="server" TabIndex="10"></asp:TextBox>

</td>

</tr>

<tr>

<td width="10%" align="right">

<asp:Label ID="lblfrom" runat="server" Text="From:"></asp:Label>

<asp:Label ID="lblredstar3" runat="server" CssClass="redtext" Text="*"></asp:Label>

</td>

<td align="left" width="90%">

<asp:TextBox ID="txtemailfrom" Width="50%" runat="server"></asp:TextBox>

<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" CssClass="redtext"

Display="static" ControlToValidate="txtemailfrom" ErrorMessage="Enter valid Email Address"

ValidationExpression="\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"></asp:RegularExpressionValidator>

</td>

</tr>

<tr>

<td width="10%" align="right">

<asp:Label ID="lblsubject" runat="server" Text="Subject:"></asp:Label>

<asp:Label ID="lblredstar4" runat="server" CssClass="redtext" Text="*"></asp:Label>

</td>

<td align="left" width="90%">

<asp:TextBox ID="txtsubject" Width="50%" runat="server"></asp:TextBox>

</td>

</tr>

<tr>

<td width="10%" align="right">

<asp:Label ID="lblAttachFile" runat="server" Text="File to send:"></asp:Label>

</td>

<td align="left" width="90%">

<input type="file" id="fileAttachement" runat="server" name="fileAttachement" />

</td>

</tr>

<tr>

<td>

</td>

<td align="left">

<asp:Button ID="btnSendEmail" runat="server" Width="60px" Text="Send Mail" OnClick="btnSendEmail_Click" />

</td>

</tr>

</table>

</fieldset>

</td>

</tr>

</table>

</div>

</form>

</body>

</html>

.CS CODE:-

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Net.Mail;

using System.Data.SqlClient;

using System.IO;

public partial class sapnamalik_sendmail : System.Web.UI.Page

{

SqlDataAdapter da;

DataSet ds = new DataSet();

SqlCommand cmd = new SqlCommand();

SqlConnection con;

string FileName;

protected void Page_Load(object sender, EventArgs e)

{

}

protected void btnSendEmail_Click(object sender, EventArgs e)

{

if (txtemailto.Text == "" || txtemailfrom.Text == "" || txtemailcc.Text == "" || txtemailbcc.Text == "" || txtsubject.Text == "")

{

txtemailto.Focus();

lblmail.Text = "Please fill all mandatory fields.";

lblmail.Visible = true;

return;

}

sendMessage();

txtemailto.Text = "";

txtemailfrom.Text = "";

txtemailcc.Text = "";

txtemailbcc.Text = "";

txtsubject.Text = "";

}

private void sendMessage()

{

string cc = txtemailcc.Text;

string bcc = txtemailbcc.Text;

SmtpClient smtpClient = new SmtpClient();

MailMessage mailMessage = new MailMessage();

try

{

MailAddress fromAddress = new MailAddress(txtemailfrom.Text);

mailMessage.From = fromAddress;

string MailTo = txtemailto.Text;

mailMessage.To.Add(MailTo);

//Sending Email with CC and BCC options

//Set the CC address of the mail message

if (txtemailcc.Text.Trim().Length != 0)

mailMessage.CC.Add(txtemailcc.Text);

//Set the BCC address of the mail message

if (txtemailbcc.Text.Trim().Length != 0)

mailMessage.Bcc.Add(txtemailbcc.Text);

mailMessage.Subject = txtsubject.Text;

//Sending Email with Attachment facility

if (fileAttachement.PostedFile != null)

{

HttpPostedFile AttachFile = fileAttachement.PostedFile;

int AttachFileLength = AttachFile.ContentLength;

if (AttachFileLength > 0)

{

FileName = Path.GetFileName(fileAttachement.PostedFile.FileName);

}

}

//Note: When you make "IsBodyHtml" to true make

//ValidateRequest="false" in page derective

//As to make HTML content passed.

string Body = "";

Body += '\n' + "Email:" + txtemailfrom.Text;

Body += '\n' + "";

mailMessage.IsBodyHtml = true;

mailMessage.Body = Body;

//Sending Email with Reply-To options

//Setting Reply address.

if (txtemailto.Text.Trim().Length != 0)

{

mailMessage.Headers.Add("Reply-To", txtemailto.Text);

}

else

{

mailMessage.Headers.Add("Reply-To", txtemailto.Text);

}

smtpClient.Host = "localHost";

smtpClient.Send(mailMessage);

lblmail.Visible = true;

lblmail.Text = "Your mail has been sent successfully";

tblemail.Visible = true;

}

catch (Exception ex)

{

lblmail.Visible = true;

lblmail.Text = "There has been some error, please try again after some time.";

}

}

}

Output: