public class Mail

    {

        private string mailkey;

        private string mailSecret;

        public string mailFrom;

        public Mail()

        {

            this.mailkey = BaseHelper.GetValue("MailKey");

            this.mailSecret = BaseHelper.GetValue("MailSecret");

            this.mailFrom = BaseHelper.GetValue("MailFrom");

        }

        public Mail(string key,string secret,string username)

        {

            this.mailkey = key;

            this.mailSecret = secret;

            this.mailFrom = username;

        }

        /// <summary>

        /// 群发邮件

        /// </summary>

        /// <param name="title">标题</param>

        /// <param name="content">内容</param>

        /// <param name="toUsers">接收方</param>

        /// <returns></returns>

        public ResultDTO Send(string title,string content,string[] toUsers)

        {

            try

            {

                MailMessage mail = new MailMessage();

                mail.Subject = title;

                mail.From = new MailAddress(this.mailkey,this.mailFrom);

                foreach (var user in toUsers)

                {

                    mail.To.Add(new MailAddress(user));

                }

                mail.Body = content;

                mail.BodyEncoding = Encoding.UTF8;

                mail.IsBodyHtml = true;

                SmtpClient client = new SmtpClient();

                client.Host = "smtp.163.com";

                client.Port = 25;

                client.UseDefaultCredentials = false;

                client.Credentials = new NetworkCredential(this.mailkey,this.mailSecret);

                client.DeliveryMethod = SmtpDeliveryMethod.Network;

                client.Send(mail);

                return WebApi.Success("邮件发送成功！");

            }

            catch(Exception e)

            {

                return WebApi.Error(e.Message);

            }

        }

        /// <summary>

        /// 单发邮件

        /// </summary>

        /// <param name="title"></param>

        /// <param name="content"></param>

        /// <param name="toUser"></param>

        /// <returns></returns>

        public ResultDTO Send(string title, string content, string toUser)

        {

            return Send(title, content, new[] {toUser});

        }

    }