Sending mail in Asp.net

Submitted by jitendramcu on Monday, October 26, 2009 - 14:48.

Language

For sending a mail in Asp.net,import System.Net.Mail Namespace. This is a simple application which u can use as a feedback form or contact us page. Create a simple default.aspx page with following code.

<form id="form1" runat="server">
  <div style="text-align: center">
    <div>
      <asp:Label ID="lblErrorMsg" runat="server" Text="Label"></asp:Label>
    </div>
    <table border="1">
      <tr>
        <td colspan="2" style="font-weight: 700; text-align: center; background-color: #F7C331;"> Send Mail in ASP.net through SMTP </td>
      </tr>
      <tr>
        <td style="font-weight: 700; text-align: right;"> TO </td>
        <td><asp:TextBox ID="txtTo" runat="server" Width="242px"></asp:TextBox>
        </td>
      </tr>
      <tr>
        <td style="font-weight: 700; text-align: right;"> From </td>
        <td><asp:TextBox ID="txtFrom" runat="server" Width="242px"></asp:TextBox>
        </td>
      </tr>
      <tr>
        <td style="font-weight: 700; text-align: right;"> CC </td>
        <td><asp:TextBox ID="txtcc" runat="server" Width="242px"></asp:TextBox>
        </td>
      </tr>
      <tr>
        <td style="font-weight: 700; text-align: right;"> BCC </td>
        <td><asp:TextBox ID="txtbcc" runat="server" Width="242px"></asp:TextBox>
        </td>
      </tr>
      <tr>
        <td style="font-weight: 700; text-align: right;"> Subject </td>
        <td><asp:TextBox ID="txtSub" runat="server" Width="242px"></asp:TextBox>
        </td>
      </tr>
      <tr>
        <td style="font-weight: 700; text-align: right;"> Message </td>
        <td><asp:TextBox ID="txtMsg" runat="server" TextMode="MultiLine" Height="75px" Width="246px"></asp:TextBox>
        </td>
      </tr>
      <tr>
        <td style="font-weight: 700"> Attachment </td>
        <td><asp:FileUpload ID="FileUpload1" runat="server" Width="244px" />
        </td>
      </tr>
      <tr>
        <td></td>
        <td><asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="SendMail" />
        </td>
      </tr>
    </table>
  </div>
</form>

And paste the code in Default.aspx.cs page(i,e codebehind )

try
            {
                SmtpClient stp = new SmtpClient();
                //Create a smtpclient object for sending mail.
                MailMessage mail = new MailMessage();
                //Create a MailMessage object for drafting mail.
                MailAddress madd = new MailAddress(txtFrom.Text);
                mail.From = madd;
                mail.To.Add(txtTo.Text);
 
                if (!string.IsNullOrEmpty(txtcc.Text.Trim()))
                {
                    mail.CC.Add(txtcc.Text.Trim());
                }
                if (!string.IsNullOrEmpty(txtbcc.Text.Trim()))
                {
                    mail.CC.Add(txtbcc.Text.Trim());
                }
 
                if (FileUpload1.HasFile == true)
                {
                    string attachFile = FileUpload1.PostedFile.FileName.ToString();
                    mail.Attachments.Add(new Attachment(attachFile));
                }
 
                mail.Subject = txtSub.Text.Trim();
                mail.Body = txtMsg.Text.Trim();
 
                stp.Send(mail);//sending mail using Send method of SmtpClient class.
                lblErrorMsg.Text = "Mail successfully sent.";
            }
            catch (Exception ex)
            {
                lblErrorMsg.Text = ex.Message;
            }

Mail Setting in Web.Config file. Using this code under the configuration tag

<system.net>
<mailSettings>
<smtp deliveryMethod="Network" from="[email protected]" >
<network defaultCredentials="true" host="192.168.0.1" port="25" userName=" [email protected] " password="test"/>
 
</smtp>
</mailSettings>
</system.net>

Accessing web.config setting in our code behind page First import System.Configuration Namespace.

 Configuration conf = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration(HttpContext.Current.Request.ApplicationPath);
   System.Net.Configuration.MailSettingsSectionGroup mailsettings = (System.Net.Configuration.MailSettingsSectionGroup)conf.GetSectionGroup("system.net/mailSettings");
   Response.Write("DefaultCredentials:-&gt;" + mailsettings.Smtp.Network.DefaultCredentials);
   Response.Write("
 Host:-&gt;" + mailsettings.Smtp.Network.Host);
   Response.Write("
 Port:-&gt;" + mailsettings.Smtp.Network.Port);
   Response.Write("
 UserName:-&gt;" + mailsettings.Smtp.Network.UserName);
   Response.Write("
 Password:-&gt;" + mailsettings.Smtp.Network.Password);

Note: Due to the size or complexity of this submission, the author has submitted it as a .zip file to shorten your download time. After downloading it, you will need a program like Winzip to decompress it.

Virus note: All files are scanned once-a-day by SourceCodester.com for viruses, but new viruses come out every day, so no prevention program can catch 100% of them.

FOR YOUR OWN SAFETY, PLEASE:

1. Re-scan downloaded files using your personal virus checker before using it.
2. NEVER, EVER run compiled files (.exe's, .ocx's, .dll's etc.)--only run source code.