EmailHelper类

 public class EmailHelper
    {
        /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="smtpServer">smtp服务器</param>
        /// <param name="port">端口</param>
        /// <param name="mailFrom">发件人邮箱</param>
        /// <param name="userPassword">密码</param>
        /// <param name="mailTo">收件人</param>
        /// <param name="strcc">抄送人</param>
        /// <param name="strBcc">密送</param>
        /// <param name="mailSubject">邮件主题</param>
        /// <param name="mailContent">内容</param>
        /// <param name="strs">附件</param>
        /// <returns>发送成功返回true否则false</returns>
        public static bool SendEmail(string smtpServer, int port, string mailFrom, string userPassword, string mailTo, string strcc,string strBcc,string mailSubject, string mailContent, string strs)
        {
            try
            {
                // 设置发送方的邮件信息
                // 邮件服务设置
                SmtpClient smtpClient = new SmtpClient();
                smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;//指定电子邮件发送方式
                smtpClient.Host = smtpServer; //指定SMTP服务器
                smtpClient.Port = port;//端口
                smtpClient.Credentials = new System.Net.NetworkCredential(mailFrom, userPassword);//验证用户名和密码
                smtpClient.EnableSsl = true; //使用SSL
                // 发送邮件设置
                MailMessage mailMessage = new MailMessage(mailFrom, mailTo); // 发送人和收件人

                mailMessage.Subject = mailSubject;//主题
                mailMessage.Body = mailContent;//内容
                mailMessage.BodyEncoding = Encoding.UTF8;//正文编码
                mailMessage.IsBodyHtml = true;//设置为HTML格式
                mailMessage.Priority = MailPriority.Normal;//优先级
                //抄送人
                if (!string.IsNullOrEmpty(strcc))
                    mailMessage.CC.Add(strcc);
                //密送
                if (!string.IsNullOrEmpty(strBcc))
                    mailMessage.Bcc.Add(strBcc);
                //附件
                if (!string.IsNullOrEmpty(strs))
                {
                    List<string> paths = new List<string>();
                    if (strs.Contains(","))
                    {
                        paths = strs.Split(‘,‘).ToList();
                    }
                    else
                    {
                        paths.Add(strs);

                    }
                    foreach (var path in paths)
                    {
                        mailMessage.Attachments.Add(new Attachment(strs));
                    }
                }
                smtpClient.Send(mailMessage); // 发送邮件
                return true;
            }
            catch
            {
                return false;
            }
        }
    }

调用发送邮件的方法:

 static void Main(string[] args)
        {
            //获得各种参数，不需要的用空字符串
            string path = Directory.GetCurrentDirectory();
            string file = path + @"\Excel.xlsx"; //附件1
            string file2 = path + @"\Excel2.xlsx";//附件2
            string smtpServer = "smtp.163.com";//163邮箱的smtp服务器
            int port = 25;//端口
            string mailFrom = "******@163.com";//发件人邮箱
            string pwd = "*********";//密码
            string mailTo = "[email protected],[email protected]";//收件人邮箱,多个用户用逗号隔开
            string mailCC = "";//抄送人,多个用户用逗号隔开
            string mailBcc = "";//密送
            string mailSubject = "测试邮件";//主题
            string mailContent = "HI,这是我发给你的一个测试邮件";//内容
            string ah = file+","+file2; //附件-文件路径
            if (EmailHelper.SendEmail(smtpServer, port, mailFrom, pwd, mailTo, mailCC, mailBcc, mailSubject, mailContent, ah) == true)
            {
                Console.WriteLine("发送成功!");
            }
            else
                Console.WriteLine("发送失败");

            Console.ReadKey();
        }

注意:

• 确认发件人的邮箱已开通smtp;
• 对应邮箱的smtp填写正确，例:126邮箱:[email protected]
• 对应的邮箱SendEmail 中是否要使用SSL加密连接