使用163邮箱的.NET发送邮件示例

 public static void SendEmail()
    {



        System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient();
        //这里使用QQ的邮箱来发送测试，如果是其它邮箱，请根据其它邮箱POP3/IMAP/SMTP服务来设置    
//这里使用163邮箱
        //client.Host = "smtp.qq.com";  
        client.Host = "smtp.163.com";
        client.UseDefaultCredentials = false;
        client.Credentials = new System.Net.NetworkCredential("你的邮箱", "你的邮箱密码");
        client.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
        System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage("你的邮箱", "对方的邮箱");
        message.Subject = "主题";
        message.Body = "内容";
        message.BodyEncoding = System.Text.Encoding.UTF8;
        message.IsBodyHtml = true;
        //添加附件  
        Attachment data = new Attachment(@"附件路径", System.Net.Mime.MediaTypeNames.Application.Octet);
        message.Attachments.Add(data);

        try
        {
            client.Send(message);

        }
        catch
        {