c# 163网易发送邮件

是4.0的，说以添加包是

代码：

public class SendEmailInfo
    {
        /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="model"></param>
        public string Send163Email(EmailSend model)
        {
            try
            {
                MailMessage mailMsg = new MailMessage();
                //邮件的优先级，分为 Low, Normal, High，通常用 Normal即可
                mailMsg.Priority = MailPriority.Normal;
                //发件人
                mailMsg.From = new MailAddress(model.addresser.caccount);
                //收件人
                foreach (var it in model.recipients)
                {
                    mailMsg.To.Add(new MailAddress(it));
                }
                //如果你的邮件标题包含中文，这里一定要指定，否则对方收到的极有可能是乱码。
                mailMsg.SubjectEncoding = Encoding.GetEncoding(936);
                //标题
                mailMsg.Subject = model.titlite;
                //正文
                mailMsg.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(model.context, Encoding.UTF8, MediaTypeNames.Text.Html));
                //附件
                if (model.accessoryPath != null)
                {
                    foreach (string path in model.accessoryPath)
                    {
                        //将附件添加到邮件
                        mailMsg.Attachments.Add(new Attachment(path));
                        //获取或设置此电子邮件的发送通知。
                        mailMsg.DeliveryNotificationOptions = DeliveryNotificationOptions.OnSuccess;
                    }
                }
                SmtpClient smtpClient = new SmtpClient();
                //根据发件人的邮件地址判断发件服务器地址   默认端口一般是25
                string[] addressor = model.addresser.caccount.Split(new Char[] { '@', '.' });
                switch (addressor[1])
                {
                    case "163":
                        smtpClient.Host = "smtp.163.com";
                        break;
                    case "126":
                        smtpClient.Host = "smtp.126.com";
                        break;
                    case "qq":
                        smtpClient.Host = "smtp.qq.com";
                        break;
                    case "gmail":
                        smtpClient.Host = "smtp.gmail.com";
                        break;
                    case "hotmail":
                        smtpClient.Host = "smtp.live.com";//outlook邮箱//client.Port = 587;
                        break;
                    case "foxmail":
                        smtpClient.Host = "smtp.foxmail.com";
                        break;
                    case "sina":
                        smtpClient.Host = "smtp.sina.com.cn";
                        break;
                    default:
                        smtpClient.Host = "smtp.exmail.qq.com";//qq企业邮箱
                        break;
                }
                //使用安全加密连接。
                smtpClient.EnableSsl = true;
                //不和请求一块发送。
                smtpClient.UseDefaultCredentials = false;
                //验证发件人身份(发件人的邮箱，邮箱里的生成授权码);
                smtpClient.Credentials = new NetworkCredential(model.addresser.caccount, model.addresser.password);
                //如果发送失败，SMTP 服务器将发送 失败邮件告诉我  
                mailMsg.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;
                //加这段之前用公司邮箱发送报错：根据验证过程，远程证书无效
                //加上后解决问题
                ServicePointManager.ServerCertificateValidationCallback = delegate (Object obj, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; };
                
                smtpClient.Send(mailMsg);
                smtpClient.Dispose();
                return "";
            }
            catch (Exception ex)
            {
                Console.Write(ex.Message);
                return ex.Message;
            }
        }
    }

    public class EmailSend
    {
        /// <summary>
        /// 发件人
        /// </summary>
        public Addresser addresser { get; set; }
        /// <summary>
        /// 收件人
        /// </summary>
        public List<string> recipients { get; set; }
        /// <summary>
        /// 标题
        /// </summary>
        public string titlite { get; set; }
        /// <summary>
        /// 内容
        /// </summary>
        public string context { get; set; }
        /// <summary>
        /// 附件地址
        /// </summary>
        public List<string> accessoryPath { get; set; }
    }

    /// <summary>
    /// 发件人
    /// </summary>
    public class Addresser
    {
        /// <summary>
        /// 账号
        /// </summary>
        public string caccount { get; set; }
        /// <summary>
        /// 秘钥
        /// </summary>
        public string password { get; set; }
    }

demo的地址：https://gitee.com/cainiaoA/sendEmail