[Reprint] Email

using System;
using System.Net;
using System.Net.Mail;
using System.Text;
using System.Threading;

namespace Demo.Code
{
    public class MailHelper
    {
        /// <summary>
        /// Mail server address
        /// </summary>
        public string MailServer { get; set; }
        /// <summary>
        /// username
        /// </summary>
        public string MailUserName { get; set; }
        /// <summary>
        /// password
        /// </summary>
        public string MailPassword { get; set; }
        /// <summary>
        /// name
        /// </summary>
        public string MailName { get; set; }

        /// <summary>
        /// Send emails synchronously
        /// </summary>
        /// <param name="to">recipient email address</param>
        /// <param name="subject">主题</param>
        /// <param name="body">内容</param>
        /// <param name="encoding">编码</param>
        /// <param name="isBodyHtml">是否Html</param>
        /// <param name="enableSsl">Is SSL encrypted connection</param>
        /// <returns>Successful</returns>
        public bool Send(string to, string subject, string body, string encoding = "UTF-8", bool isBodyHtml = true, bool enableSsl = false)
        {
            try
            {
                MailMessage message = new MailMessage();
                // recipient email address
                message.To.Add(new MailAddress(to));
                message.From = new MailAddress(MailUserName, MailName);
                message.BodyEncoding = Encoding.GetEncoding(encoding);
                message.Body = body;
                //GB2312
                message.SubjectEncoding = Encoding.GetEncoding(encoding);
                message.Subject = subject;
                message.IsBodyHtml = isBodyHtml;

                SmtpClient smtpclient = new SmtpClient(MailServer, 25);
                smtpclient.Credentials = new System.Net.NetworkCredential(MailUserName, MailPassword);
                //SSL connection
                smtpclient.EnableSsl = enableSsl;
                smtpclient.Send(message);
                return true;
            }
            catch (Exception)
            {
                throw;
            }
        }
        /// <summary>
        /// Asynchronously send emails to a separate thread
        /// </summary>
        /// <param name="to">Mail recipient</param>
        /// <param name="title">Email title</param>
        /// <param name="body">mail content</param>
        /// <param name="port">Port number</param>
        /// <returns></returns>
        public void SendByThread(string to, string title, string body, int port = 25)
        {
            new Thread(new ThreadStart(delegate()
            {
                try
                {
                    SmtpClient smtp = new SmtpClient();
                    //The smtp address of the mailbox
                    smtp.Host = MailServer;
                    //The port number
                    smtp.Port = port;
                    //Build the sender's identity credential class
                    smtp.Credentials = new NetworkCredential(MailUserName, MailPassword);
                    //build message class
                    MailMessage objMailMessage = new MailMessage();
                    //set priority
                    objMailMessage.Priority = MailPriority.High;
                    // message sender
                    objMailMessage.From = new MailAddress(MailUserName, MailName, System.Text.Encoding.UTF8);
                    //recipient
                    objMailMessage.To.Add(to);
                    //title
                    objMailMessage.Subject = title.Trim();
                    // title character encoding
                    objMailMessage.SubjectEncoding = System.Text.Encoding.UTF8;
                    //text
                    objMailMessage.Body = body.Trim();
                    objMailMessage.IsBodyHtml = true;
                    //Content character encoding
                    objMailMessage.BodyEncoding = System.Text.Encoding.UTF8;
                    //send
                    smtp.Send(objMailMessage);
                }
                catch (Exception)
                {
                    throw;
                }

            })).Start();
        }
    }
}