1     <h2>
 2         发送电子邮件演示
 3     </h2>
 4     <table cellpadding="0" cellspacing="0" border="0" style="font-family: 宋体, Arial, Helvetica, sans-serif;
 5         font-size: 15px; width: 411px;">
 6         <tr>
 7             <td class="style5">
 8                 邮箱地址：
 9             </td>
10             <td class="style6">
11                 <asp:TextBox ID="tb_Email" runat="server" Width="269px"></asp:TextBox>
12             </td>
13         </tr>
14         <tr>
15             <td class="style5">
16                 抄送至：
17             </td>
18             <td class="style6">
19                 <asp:TextBox ID="tb_cc" runat="server" Width="268px"></asp:TextBox>
20             </td>
21         </tr>
22         <tr>
23             <td class="style5">
24                 邮件主题：
25             </td>
26             <td class="style6">
27                 <asp:TextBox ID="tb_Subject" runat="server" Width="268px"></asp:TextBox>
28             </td>
29         </tr>
30         <tr>
31             <td class="style5">
32                 邮件内容：
33             </td>
34             <td class="style6">
35                 <asp:TextBox ID="tb_Body" runat="server" Height="63px" TextMode="MultiLine" Width="266px"></asp:TextBox>
36             </td>
37         </tr>
38         <tr>
39             <td class="style5">
40                 添加附件：
41             </td>
42             <td class="style6">
43                 <asp:FileUpload ID="tb_Attachment" runat="server" Width="265px" />
44             </td>
45         </tr>
46         <tr>
47             <td align="right" colspan="2">
48                 <asp:Button ID="btn_SendEmail" runat="server" Text="发送邮件" OnClick="btn_SendEmail_Click" />
49             </td>
50         </tr>
51     </table>

 1 protected void btn_SendEmail_Click(object sender, EventArgs e)
 2         {
 3             //声明一个Mail对象
 4             MailMessage mymail = new MailMessage();
 5             //发件人地址
 6             //如是自己，在此输入自己的邮箱
 7             mymail.From = new MailAddress("[email protected]");
 8             //收件人地址
 9             mymail.To.Add(new MailAddress(tb_Email.Text));
10             //邮件主题
11             mymail.Subject = tb_Subject.Text;
12             //邮件标题编码
13             mymail.SubjectEncoding = System.Text.Encoding.UTF8;
14             //发送邮件的内容
15             mymail.Body = tb_Body.Text;
16             //邮件内容编码
17             mymail.BodyEncoding = System.Text.Encoding.UTF8;
18             //添加附件
19             Attachment myfiles = new Attachment(tb_Attachment.PostedFile.FileName);
20             mymail.Attachments.Add(myfiles);
21             //抄送到其他邮箱
22             mymail.CC.Add(new MailAddress(tb_cc.Text));
23             //是否是HTML邮件
24             mymail.IsBodyHtml = true;
25             //邮件优先级
26             mymail.Priority = MailPriority.High;
27             //创建一个邮件服务器类
28             SmtpClient myclient = new SmtpClient();
29             myclient.Host = "SMTP.163.com"; 
30             //SMTP服务端口
31             myclient.Port = 25;
32             //验证登录
33             myclient.Credentials = new NetworkCredential("@@@@@@", "*****");//"@"输入有效的邮件名, "*"输入有效的密码
34             myclient.Send(mymail);
35         }