C#发送邮件

 /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="to">收件人邮件地址</param>
        /// <param name="from">发件人邮件地址</param>
        /// <param name="subject">邮件主题</param>
        /// <param name="body">邮件内容</param>
        /// <param name="username">登录smtp主机时用到的用户名,注意是邮件地址'@'以前的部分</param>
        /// <param name="password">登录smtp主机时用到的用户密码</param>
        /// <param name="smtpHost">发送邮件用到的smtp主机</param>
        public static void SendEmail(string to, string from, string subject, string body, string userName, string password, string smtpHost)
        {
            MailAddress from1 = new MailAddress(from);
            MailAddress to1 = new MailAddress(to);
            MailMessage message = new MailMessage(from1, to1);
            message.Subject = subject;//设置邮件主题
            message.IsBodyHtml = true;//设置邮件正文为html格式
            message.Body = body;//设置邮件内容
            SmtpClient client = new SmtpClient(smtpHost);
            //设置发送邮件身份验证方式
            //注意如果发件人地址是[e-mail]，则用户名是abc而不是[e-mail]，也有可能是abc！ 如QQ企业邮箱
            client.Credentials = new NetworkCredential(userName, password);
            client.Send(message);
        }