NET 2.0 发送EMail邮件

protected void Button1_Click(object sender, EventArgs e)
    ...{
         System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage();
        //收件人
         message.To.Add(txtMailAddress.Text);
        //抄送
        foreach(string mailAddress in txtCopyAddress.Text.Split(','))
        ...{
            if (!string.IsNullOrEmpty(mailAddress))
            ...{
                 message.CC.Add(mailAddress);
             }
         }        
        //主题
         message.Subject = txtSubject.Text;

         message.From = new System.Net.Mail.MailAddress(fromAddress);
         message.Body = txtMailContents.Text;
        //发送附件
        if (fulAttachment.HasFile)
        ...{
             System.Net.Mail.Attachment attachment = new System.Net.Mail.Attachment(fulAttachment.PostedFile.FileName);
             message.Attachments.Add(attachment);
         }
         System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient(txtSMTPAddress.Text);
        smtp.Credentials = new System.Net.NetworkCredential(txtUserName.Text,txtPassword.Text);
        
        //smtp.usedefaultcredentials = true;
          
        try
        ...{            
             smtp.Send(message);
             lblReturnMessage.Text = "Mail Send Success!";
         }
        catch (System.Net.Mail.SmtpException ex)
        ...{
             lblReturnMessage.Text = "Send Error:" + ex.Message;
         }
      }

如果选择了163的SMTP服务器,“smtp.163.com”，发件人必须是登录用户的163 email用户地址。

System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient("smtp.163.com");
smtp.Credentials = new System.Net.NetworkCredential("163emailaddress","emailpassword");

System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage();
message.From = new System.Net.Mail.MailAddress("163emailaddress@163.com");

web.config加入

<system.net>
   <mailSettings>
    <smtp from="163emailaddress@163.com">
     <network host="smtp.163.com" password="*****" port="25" userName="username" defaultCredentials="false"/>
    </smtp>
   </mailSettings>
</system.net>

以下为VB.NET代码

Dim message As New MailMessage()
            '收件人
            message.To.Add("one@21cn.com")
            '主题
            message.Subject = "使用.NET 2.0发送邮件"
            message.From = New MailAddress("163emailaddress@163.com")
            message.Body = "非常简单"
            Dim m_smtpClient As New SmtpClient("smtp.163.com")
            m_smtpClient.Send(message)