• SMTP email from C#


           /// <summary>
            /// 一人一附件发送邮件
            ///  2017-05-17 涂聚文  GeovinDu
            /// </summary>
            /// <param name="To">接收邮件人</param>
            /// <param name="Subject">邮件标题</param>
            /// <param name="Msg">邮件内容</param>
            /// <param name="bodyHtml">是否網頁</param>
            /// <param name="AttachmentStream"></param>
            /// <param name="AttachmentFileName">附件</param>
            /// <returns></returns>
            public static bool SendEmaildu(string To, string Subject, string Msg, bool bodyHtml, MemoryStream AttachmentStream,string AttachmentFileName)
            {
                bool SendOk = false;
                try
                {
                    System.Net.Mail.MailMessage newMsg = new System.Net.Mail.MailMessage(System.Configuration.ConfigurationManager.AppSettings["mailCfg"], To, Subject, Msg);
                    newMsg.BodyEncoding = System.Text.Encoding.UTF8;
                    newMsg.HeadersEncoding = System.Text.Encoding.UTF8;
                    newMsg.SubjectEncoding = System.Text.Encoding.UTF8;
    
                    System.Net.Mail.SmtpClient smtpClient = new System.Net.Mail.SmtpClient();
                    //smtpClient.Credentials = new NetworkCredential("geovindu@dusystem.com","888888");
                    //smtpClient.Port = 25;
                    //smtpClient.EnableSsl = false;
                    if (AttachmentStream != null && AttachmentFileName != null)
                    {
    
                        // ADD AN ATTACHMENT.
                        //String sFile = @"C:SourceLNS_IS.TXT";
                        //MailAttachment oAttch = new MailAttachment(sFile, MailEncoding.Base64);
                        //string filePath = @"C:TestEmailSKYPE11月黑咭生日會員.xls";
                        //MemoryStream memStream = new MemoryStream();
                        //using (FileStream fileStream = File.OpenRead(filePath))
                        //{
    
                        //    memStream.SetLength(fileStream.Length);
                        //    fileStream.Read(memStream.GetBuffer(), 0, (int)fileStream.Length);
                        //}
    
                        newMsg.Attachments.Add(new Attachment(AttachmentStream, AttachmentFileName)); //MediaTypeNames.Image.Jpeg)                
                      
    
                        //System.Net.Mail.Attachment attachment = new System.Net.Mail.Attachment(AttachmentStream, AttachmentFileName);
                        //System.Net.Mime.ContentDisposition disposition = attachment.ContentDisposition;
                        //disposition.FileName = AttachmentFileName;
                        //disposition.DispositionType = System.Net.Mime.DispositionTypeNames.Attachment;
                        //newMsg.Attachments.Add(attachment);
    
                    }
                    newMsg.IsBodyHtml = bodyHtml;
                   
                    smtpClient.Send(newMsg);
                    SendOk = true;
                    //return SENT_OK;
                }
                catch (Exception ex)
                {
                    ex.Message.ToString();
                    AttachmentStream.Close();
                    SendOk = false;
                    //"Error: " + ex.Message + "<br/><br/>Inner Exception: "+ ex.InnerException;
    
                    
                }
                AttachmentStream.Close();
                return SendOk;
    
            }
            /// <summary>
            /// 一人一附件发送邮件
            /// 2017-05-17 涂聚文  GeovinDu
            /// </summary>
            /// <param name="To">接收邮件人</param>
            /// <param name="Subject">邮件标题</param>
            /// <param name="Msg">邮件内容</param>
            /// <param name="bodyHtml">是否網頁</param>
            /// <param name="AttachmentFileName">附件</param>
            /// <returns></returns>
            public static bool SendEmaildu(string To, string Subject, string Msg, bool bodyHtml, string AttachmentFileName)
            {
                MemoryStream AttachmentStream = new MemoryStream();
                bool SendOk = false;
                try
                {
                    System.Net.Mail.MailMessage newMsg = new System.Net.Mail.MailMessage(System.Configuration.ConfigurationManager.AppSettings["mailCfg"], To, Subject, Msg);
                    newMsg.BodyEncoding = System.Text.Encoding.UTF8;
                    newMsg.HeadersEncoding = System.Text.Encoding.UTF8;
                    newMsg.SubjectEncoding = System.Text.Encoding.UTF8;
    
                    System.Net.Mail.SmtpClient smtpClient = new System.Net.Mail.SmtpClient();
                    //smtpClient.Credentials = new NetworkCredential("geovindu@dusystem.com","888888");
                    //smtpClient.Port = 25;
                    //smtpClient.EnableSsl = false;
                    if (AttachmentStream != null && AttachmentFileName != null)
                    {
    
                        // ADD AN ATTACHMENT.
                        //String sFile = @"C:SourceLNS_IS.TXT";
                        //MailAttachment oAttch = new MailAttachment(sFile, MailEncoding.Base64);
                        //string filePath = @"C:TestEmailSKYPE11月黑咭生日會員.xls";
                        //MemoryStream memStream = new MemoryStream();
                        //using (FileStream fileStream = File.OpenRead(filePath))
                        //{
    
                        //    memStream.SetLength(fileStream.Length);
                        //    fileStream.Read(memStream.GetBuffer(), 0, (int)fileStream.Length);
                        //}
    
                        newMsg.Attachments.Add(new Attachment(AttachmentStream, AttachmentFileName)); //MediaTypeNames.Image.Jpeg)                
    
    
                        //System.Net.Mail.Attachment attachment = new System.Net.Mail.Attachment(AttachmentStream, AttachmentFileName);
                        //System.Net.Mime.ContentDisposition disposition = attachment.ContentDisposition;
                        //disposition.FileName = AttachmentFileName;
                        //disposition.DispositionType = System.Net.Mime.DispositionTypeNames.Attachment;
                        //newMsg.Attachments.Add(attachment);
    
                    }
                    newMsg.IsBodyHtml = bodyHtml;                
                    smtpClient.Send(newMsg);
                    SendOk = true;
                    //return SENT_OK;
                }
                catch (Exception ex)
                {
                    ex.Message.ToString();
                    AttachmentStream.Close();
                    SendOk = false;
                    //"Error: " + ex.Message + "<br/><br/>Inner Exception: "+ ex.InnerException;
    
    
                }
                AttachmentStream.Close();
                return SendOk;
    
            }
    
            /// <summary>
            /// 一人多附件发送邮件
            /// 2019-06-18 涂聚文 GeovinDu
            /// </summary>
            /// <param name="To">接收邮件人</param>
            /// <param name="Subject">邮件标题</param>
            /// <param name="Msg">邮件内容</param>
            /// <param name="bodyHtml">是否網頁</param>
            /// <param name="AttachmentFiles">多附件</param>
            /// <returns></returns>
            public static bool SendEmailduFiles(string To, string Subject, string Msg, bool bodyHtml, List<string> AttachmentFiles)
            {
                MemoryStream AttachmentStream = new MemoryStream();
                bool SendOk = false;
                try
                {
                    System.Net.Mail.MailMessage newMsg = new System.Net.Mail.MailMessage(System.Configuration.ConfigurationManager.AppSettings["mailCfg"], To, Subject, Msg);
                    newMsg.BodyEncoding = System.Text.Encoding.UTF8;
                    newMsg.HeadersEncoding = System.Text.Encoding.UTF8;
                    newMsg.SubjectEncoding = System.Text.Encoding.UTF8;
    
                    System.Net.Mail.SmtpClient smtpClient = new System.Net.Mail.SmtpClient();
                    //smtpClient.Credentials = new NetworkCredential("geovindu@dusystem.com","888888");
                    //smtpClient.Port = 25;
                    //smtpClient.EnableSsl = false;
                   
    
    
                    if (AttachmentStream != null && AttachmentFiles != null)
                    {
     
                     
                        foreach (string filename in AttachmentFiles)
                        {
                            newMsg.Attachments.Add(new Attachment(AttachmentStream, filename)); //MediaTypeNames.Image.Jpeg)   
                           
                        }     
    
                    }
                    newMsg.IsBodyHtml = bodyHtml;               
                    smtpClient.Send(newMsg);
                    SendOk = true;
                }
                catch (Exception ex)
                {
                    ex.Message.ToString();
                    AttachmentStream.Close();
                    SendOk = false;
                }
                AttachmentStream.Close();
                return SendOk;
            }
    
            /// <summary>
            /// 多人多附件发送邮件
            /// 不考虑统计每封邮件发送状态(另外考虑完善代码)
            ///  2019-06-18 涂聚文 GeovinDu
            /// </summary>
            /// <param name="Tos">多人接收邮件人</param>
            /// <param name="Subject">邮件标题</param>
            /// <param name="Msg">邮件内容</param>
            /// <param name="bodyHtml">是否網頁</param>
            /// <param name="AttachmentFiles">多附件</param>
            /// <returns></returns>
            public static bool SendEmailsAndFiles(List<string> Tos, string Subject, string Msg, bool bodyHtml, List<string> AttachmentFiles)
            {
                MemoryStream AttachmentStream = new MemoryStream();
                bool SendOk = false;
                List<Attachment> all = new List<Attachment>();
                try
                {
                    if (AttachmentStream != null && AttachmentFiles != null)
                    {
                        foreach (string filename in AttachmentFiles)
                        {
    
                            all.Add(new Attachment(AttachmentStream, filename));
                        }
                    }
                    if (Tos.Count > 0)
                    {
    
    
                        foreach (string To in Tos)
                        {
                            System.Net.Mail.MailMessage newMsg = new System.Net.Mail.MailMessage(System.Configuration.ConfigurationManager.AppSettings["mailCfg"], To, Subject, Msg);
                            newMsg.BodyEncoding = System.Text.Encoding.UTF8;
                            newMsg.HeadersEncoding = System.Text.Encoding.UTF8;
                            newMsg.SubjectEncoding = System.Text.Encoding.UTF8;
                            System.Net.Mail.SmtpClient smtpClient = new System.Net.Mail.SmtpClient();
                            //smtpClient.Credentials = new NetworkCredential("geovindu@dusystem.com","888888");
                            //smtpClient.Port = 25;
                            //smtpClient.EnableSsl = false;
                            if (AttachmentStream != null && AttachmentFiles != null)
                            {
                                foreach (Attachment attname in all)
                                {
                                    newMsg.Attachments.Add(attname); //MediaTypeNames.Image.Jpeg)   
    
                                }
                            }
                            newMsg.IsBodyHtml = bodyHtml;                        
                            smtpClient.Send(newMsg);
                            SendOk = true;
                       }
                    }
                }
                catch (Exception ex)
                {
                    ex.Message.ToString();
                    AttachmentStream.Close();
                    SendOk = false;
                }
                AttachmentStream.Close();
                return SendOk;
            }
    

      测试代码:

                MemoryStream theMemStream = new MemoryStream();
                string file = @"C:TestEmailSKYPE11月黑咭生日會員.xls";  //C:TestEmailTop1000WorldBanks2014.pdf
                if (File.Exists(file))
                {
                    //AttachmentStream = File.Open(file, FileMode.Open, FileAccess.Read);
    
    
                    byte[] filebyte = MirosoftSmptHelper.ReadFile(file);
    
                    theMemStream.Write(filebyte, 0, filebyte.Length);// = File.OpenRead(file); 
                    theMemStream.Position = 0;
    
                    //theMemStream.Close();
    
                    // AttachmentStream = theMemStream;// BytesToStream(filebyte); //new MemoryStream(filebyte);// // BytesToStream(filebyte);// FileToStream(file);// 
    
                    //AttachmentStream.CanTimeout =true;
                    //AttachmentStream.ReadTimeout = 1000;
                    //AttachmentStream.WriteTimeout = 1000;
                    //AttachmentStream = BytesToStream(filebyte);
    
                    //theMemStream.Close();
                }
                List<string> AttachmentFiles = new List<string>();
                AttachmentFiles.Add("馬拉松獎牌刻字.xlsx");
                AttachmentFiles.Add("进一步优化供给推动消费平稳增长2019.pdf");
                AttachmentFiles.Add("逃犯条例草案.pdf");
                AttachmentFiles.Add("复习卷14.doc");
                List<string> Tos = new List<string>();
                Tos.Add("geovindu@163.com");
                Tos.Add("geovindu@hotmail.com");
                Tos.Add("geovi@qq.com");
    
                //1.一人一附件
                //bool issend = MirosoftSmptHelper.SendEmaildu("geovindu@163.com", "中文文件名.net 4.0,geovindu 涂聚文塗聚文工團、", "<p> 生命運浪漫滿屋geovindu江蘇黃河</p><br/><p>上官放個屁,下官一台戲</p>", true,"馬拉松獎牌刻字.xlsx");
                //2.一人多附件
                //bool issend = MirosoftSmptHelper.SendEmailduFiles("geovindu@163.com", "中文文件名.net 4.0,geovindu 涂聚文塗聚文工團、", "<p> 生命運浪漫滿屋geovindu江蘇黃河</p><br/><p>上官放個屁,下官一台戲</p>", true, AttachmentFiles);
               //3.多人多附件
                bool issend = MirosoftSmptHelper.SendEmailsAndFiles(Tos, "中文文件名.net 4.0,geovindu 涂聚文塗聚文工團、", "<p> 生命運浪漫滿屋geovindu江蘇黃河</p><br/><p>上官放個屁,下官一台戲</p>", true, AttachmentFiles);
                theMemStream.Close();
                if (issend)
                {
                    MessageBox.Show("ok");
                }
                else
                {
                    MessageBox.Show("no");
                }
            }
    

      不忘初心,方得始终;初心易得,始终难守。

            /// <summary>
            /// 多人多附件发送邮件
            /// 不考虑统计每封邮件发送状态(另外考虑完善代码)
            ///  2019-06-18 涂聚文 GeovinDu
            ///  2019-07-01
            /// </summary>
            /// <param name="Tos">多人接收邮件人</param>
            /// <param name="Subject">邮件标题</param>
            /// <param name="Msg">邮件内容</param>
            /// <param name="bodyHtml">是否網頁</param>
            /// <param name="AttachmentFiles">多附件--具体文件地址</param>
            /// <returns></returns>
            public static bool SendEmailsAndFiles(List<string> Tos, string Subject, string Msg, bool bodyHtml, List<string> AttachmentFiles)
            {
                MemoryStream AttachmentStream = new MemoryStream();
                bool SendOk = false;
                List<Attachment> all = new List<Attachment>();
                try
                {
                    if (AttachmentStream != null && AttachmentFiles != null)
                    {
                        foreach (string filename in AttachmentFiles)
                        {
                            Attachment attachment = new Attachment(filename, MediaTypeNames.Application.Octet); // //AttachmentStream, filename
                            ContentDisposition disposition = attachment.ContentDisposition;
                            disposition.CreationDate = File.GetCreationTime(filename);
                            disposition.ModificationDate = File.GetLastWriteTime(filename);
                            disposition.ReadDate = File.GetLastAccessTime(filename);
                            disposition.FileName = Path.GetFileName(filename);
                            disposition.Size = new FileInfo(filename).Length;                      
                            disposition.DispositionType = DispositionTypeNames.Attachment;
                            all.Add(attachment); //new Attachment(AttachmentStream, filename)
                        }
                    }
                    if (Tos.Count > 0)
                    {
    
    
                        foreach (string To in Tos)
                        {
                            System.Net.Mail.MailMessage newMsg = new System.Net.Mail.MailMessage(System.Configuration.ConfigurationManager.AppSettings["mailCfg"], To, Subject, Msg);
                            newMsg.BodyEncoding = System.Text.Encoding.UTF8;
                            newMsg.HeadersEncoding = System.Text.Encoding.UTF8;
                            newMsg.SubjectEncoding = System.Text.Encoding.UTF8;
                            System.Net.Mail.SmtpClient smtpClient = new System.Net.Mail.SmtpClient();
                            //smtpClient.Credentials = new NetworkCredential("geovindu@dusystem.com","888888");
                            //smtpClient.Port = 25;
                            //smtpClient.EnableSsl = false;
                            if (AttachmentStream != null && AttachmentFiles != null)
                            {
                                foreach (Attachment attname in all)
                                {
    
                                    
                                    newMsg.Attachments.Add(attname); //MediaTypeNames.Image.Jpeg)   
    
                                }
                            }
                            newMsg.IsBodyHtml = bodyHtml;                        
                            smtpClient.Send(newMsg);
                            SendOk = true;
                       }
                    }
                }
                catch (Exception ex)
                {
                    ex.Message.ToString();
                    AttachmentStream.Close();
                    SendOk = false;
                }
                AttachmentStream.Close();
                return SendOk;
            }
    
            /// <summary>
            /// 多人多附件发送邮件
            /// 不考虑统计每封邮件发送状态(另外考虑完善代码)
            ///  2019-07-01 涂聚文 GeovinDu
            /// </summary>
            /// <param name="Tos">多人接收邮件人</param>
            /// <param name="Subject">邮件标题</param>
            /// <param name="Msg">邮件内容</param>
            /// <param name="bodyHtml">是否網頁</param>
            /// <param name="AttachmentFiles">多附件--根据运行程序目录地址</param>
            /// <returns></returns>
            public static bool SendEmailsAndLocalFiles(List<string> Tos, string Subject, string Msg, bool bodyHtml, List<string> AttachmentFiles)
            {
                MemoryStream AttachmentStream = new MemoryStream();
                bool SendOk = false;
                List<Attachment> all = new List<Attachment>();
                try
                {
                    if (AttachmentStream != null && AttachmentFiles != null)
                    {
                        foreach (string filename in AttachmentFiles)
                        {
                            //具体的文件地址,用此法
                            //Attachment attachment = new Attachment(filename, MediaTypeNames.Application.Octet); // //AttachmentStream, filename
                            //ContentDisposition disposition = attachment.ContentDisposition;
                            //disposition.CreationDate = File.GetCreationTime(filename);
                            //disposition.ModificationDate = File.GetLastWriteTime(filename);
                            //disposition.ReadDate = File.GetLastAccessTime(filename);
                            //disposition.FileName = Path.GetFileName(filename);
                            //disposition.Size = new FileInfo(filename).Length;
                            //disposition.DispositionType = DispositionTypeNames.Attachment;
                            all.Add(new Attachment(AttachmentStream, filename));//在运行程序的目录的文件没有问题,可执行。如是不是此语言件地址,附件无效
                        }
                    }
                    if (Tos.Count > 0)
                    {
    
    
                        foreach (string To in Tos)
                        {
                            System.Net.Mail.MailMessage newMsg = new System.Net.Mail.MailMessage(System.Configuration.ConfigurationManager.AppSettings["mailCfg"], To, Subject, Msg);
                            newMsg.BodyEncoding = System.Text.Encoding.UTF8;
                            newMsg.HeadersEncoding = System.Text.Encoding.UTF8;
                            newMsg.SubjectEncoding = System.Text.Encoding.UTF8;
                            System.Net.Mail.SmtpClient smtpClient = new System.Net.Mail.SmtpClient();
                            //smtpClient.Credentials = new NetworkCredential("geovindu@dusystem.com","888888");
                            //smtpClient.Port = 25;
                            //smtpClient.EnableSsl = false;
                            if (AttachmentStream != null && AttachmentFiles != null)
                            {
                                foreach (Attachment attname in all)
                                {
                                    newMsg.Attachments.Add(attname); //MediaTypeNames.Image.Jpeg)   
    
                                }
                            }
                            newMsg.IsBodyHtml = bodyHtml;
                            smtpClient.Send(newMsg);
                            SendOk = true;
                        }
                    }
                }
                catch (Exception ex)
                {
                    ex.Message.ToString();
                    AttachmentStream.Close();
                    SendOk = false;
                }
                AttachmentStream.Close();
                return SendOk;
            }
    

      

          /// <summary>
            /// 20190702 多人邮件
            /// geovindu 涂聚文
            /// </summary>
            /// <param name="Mails"></param>
            /// <param name="Subject"></param>
            /// <param name="Msg"></param>
            /// <param name="bodyHtml"></param>
            /// <param name="AttachmentFiles"></param>
            /// <returns></returns>
            public static bool SendEmailsFiles(List<MailAddress> Mails, string Subject, string Msg, bool bodyHtml, List<string> AttachmentFiles)
            {
                MemoryStream AttachmentStream = new MemoryStream();
                bool SendOk = false;
                List<Attachment> all = new List<Attachment>();
                try
                {
                    if (AttachmentStream != null && AttachmentFiles != null)
                    {
                        foreach (string filename in AttachmentFiles)
                        {
                            //具体的文件地址,用此法
                            Attachment attachment = new Attachment(filename, MediaTypeNames.Application.Octet); // //AttachmentStream, filename
                            ContentDisposition disposition = attachment.ContentDisposition;
                            disposition.CreationDate = File.GetCreationTime(filename);
                            disposition.ModificationDate = File.GetLastWriteTime(filename);
                            disposition.ReadDate = File.GetLastAccessTime(filename);
                            disposition.FileName = Path.GetFileName(filename);
                            disposition.Size = new FileInfo(filename).Length;
                            disposition.DispositionType = DispositionTypeNames.Attachment;
                            all.Add(attachment);//在运行程序的目录的文件没有问题,可执行。如是不是此语言件地址,附件无效
                        }
                    }
                    if (Mails.Count > 0)
                    {
    
                        int c = 1;
                        foreach (MailAddress ToAddress in Mails)
                        {
    
                            MailAddress from=new MailAddress(System.Configuration.ConfigurationManager.AppSettings["mailCfg"],System.Configuration.ConfigurationManager.AppSettings["displayName"]);
                            //from.DisplayName="";
                           // from.Address=;
                            System.Net.Mail.MailMessage newMsg = new System.Net.Mail.MailMessage();
                            newMsg.From = from;
                            newMsg.To.Add(ToAddress);
                            newMsg.Subject = Subject;
                            newMsg.Body = Msg;
                            newMsg.BodyEncoding = System.Text.Encoding.UTF8;
                            newMsg.HeadersEncoding = System.Text.Encoding.UTF8;
                            newMsg.SubjectEncoding = System.Text.Encoding.UTF8;
                            System.Net.Mail.SmtpClient smtpClient = new System.Net.Mail.SmtpClient();
                            //smtpClient.Credentials = new NetworkCredential("geovindu@dusystem.com","888888");
                            //smtpClient.Port = 25;
                            //smtpClient.EnableSsl = false;
                            if (AttachmentStream != null && AttachmentFiles != null)
                            {
                                foreach (Attachment attname in all)
                                {
                                    newMsg.Attachments.Add(attname); //MediaTypeNames.Image.Jpeg)  
                                }
                            }
                            newMsg.IsBodyHtml = bodyHtml;
                            //smtpClient.Send(newMsg);
                            smtpClient.SendCompleted += new SendCompletedEventHandler(SendCompletedCallback);
                            string userState = "test message:"+c.ToString();
                            smtpClient.SendAsync(newMsg, userState);
                            SendOk = true;
                            c++;
                        }
                        
                    }
                }
                catch (Exception ex)
                {
                    ex.Message.ToString();
                    AttachmentStream.Close();
                    SendOk = false;
                }
                AttachmentStream.Close();
                return SendOk;
            }
            /// <summary>
            /// 一人多附件
            /// </summary>
            /// <param name="Mails"></param>
            /// <param name="Subject"></param>
            /// <param name="Msg"></param>
            /// <param name="bodyHtml"></param>
            /// <param name="AttachmentFiles"></param>
            /// <returns></returns>
            public static bool SendEmailFiles(MailAddress Mails, string Subject, string Msg, bool bodyHtml, List<string> AttachmentFiles)
            {
                MemoryStream AttachmentStream = new MemoryStream();
                bool SendOk = false;
                List<Attachment> all = new List<Attachment>();
                try
                {
                    if (AttachmentStream != null && AttachmentFiles != null)
                    {
                        foreach (string filename in AttachmentFiles)
                        {
                            //具体的文件地址,用此法
                            Attachment attachment = new Attachment(filename, MediaTypeNames.Application.Octet); // //AttachmentStream, filename
                            ContentDisposition disposition = attachment.ContentDisposition;
                            disposition.CreationDate = File.GetCreationTime(filename);
                            disposition.ModificationDate = File.GetLastWriteTime(filename);
                            disposition.ReadDate = File.GetLastAccessTime(filename);
                            disposition.FileName = Path.GetFileName(filename);
                            disposition.Size = new FileInfo(filename).Length;
                            disposition.DispositionType = DispositionTypeNames.Attachment;
                            all.Add(attachment);//在运行程序的目录的文件没有问题,可执行。如是不是此语言件地址,附件无效
                        }
                    } 
       
    
                        MailAddress from = new MailAddress(System.Configuration.ConfigurationManager.AppSettings["mailCfg"], System.Configuration.ConfigurationManager.AppSettings["displayName"]);
                        //from.DisplayName="";
                        // from.Address=;
                        System.Net.Mail.MailMessage newMsg = new System.Net.Mail.MailMessage();
                        newMsg.From = from;
                        newMsg.To.Add(Mails);
                        newMsg.Subject = Subject;
                        newMsg.Body = Msg;
                        newMsg.BodyEncoding = System.Text.Encoding.UTF8;
                        newMsg.HeadersEncoding = System.Text.Encoding.UTF8;
                        newMsg.SubjectEncoding = System.Text.Encoding.UTF8;
                        System.Net.Mail.SmtpClient smtpClient = new System.Net.Mail.SmtpClient();
                        //smtpClient.Credentials = new NetworkCredential("geovindu@dusystem.com","888888");
                        //smtpClient.Port = 25;
                        //smtpClient.EnableSsl = false;
                        if (AttachmentStream != null && AttachmentFiles != null)
                        {
                            foreach (Attachment attname in all)
                            {
                                newMsg.Attachments.Add(attname); //MediaTypeNames.Image.Jpeg)  
                            }
                        }
                        newMsg.IsBodyHtml = bodyHtml;
                        //smtpClient.Send(newMsg);
                        smtpClient.SendCompleted += new SendCompletedEventHandler(SendCompletedCallback);
                        string userState = "test message:发送中";
                        smtpClient.SendAsync(newMsg, userState);
                        SendOk = true;                       
                       
                    
                }
                catch (Exception ex)
                {
                    ex.Message.ToString();
                    AttachmentStream.Close();
                    SendOk = false;
                }
                AttachmentStream.Close();
                return SendOk;
            }
    

      测试

      List<MailAddress> mails = new List<MailAddress>();
                MailAddress address = null;
                address = new MailAddress("geovindu@163.com", "涂聚文", Encoding.UTF8);           
                mails.Add(address);
                address = new MailAddress("geovindu@hotmail.com", "塗聚文", Encoding.UTF8);
                mails.Add(address);
                address = new MailAddress("463588883@qq.com", "捷為工作室", Encoding.UTF8);
                mails.Add(address);
                string strMessage = string.Empty;
                string subject = string.Empty;
    
                subject=txtSubject.Text.Trim();
                strMessage = htmlEditUserControl1.HtmlEditControl.DocumentText;
    
                //1.一人一附件
                //bool issend = MirosoftSmptHelper.SendEmaildu("geovindu@163.com", "中文文件名.net 4.0,geovindu 涂聚文塗聚文工團、", "<p> 生命運浪漫滿屋geovindu江蘇黃河</p><br/><p>上官放個屁,下官一台戲</p>", true,"馬拉松獎牌刻字.xlsx");
                //2.一人多附件
                //bool issend = MirosoftSmptHelper.SendEmailduFiles("geovindu@163.com", "中文文件名.net 4.0,geovindu 涂聚文塗聚文工團、", "<p> 生命運浪漫滿屋geovindu江蘇黃河</p><br/><p>上官放個屁,下官一台戲</p>", true, AttachmentFiles);
               //3.多人多附件
                //bool issend = MirosoftSmptHelper.SendEmailsAndFiles(Tos, subject, strMessage, true, AttachmentFiles);
                bool issend = MirosoftSmptHelper.SendEmailsFiles(mails, subject, strMessage, true, AttachmentFiles);
    

      

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  • 原文地址:https://www.cnblogs.com/geovindu/p/11045584.html
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