.net 发送qq邮件

最近开发一个项目,需要给客户发送报告邮件,在开发中遇到本地调试发送邮件一切正常,但当部署到服务器上的时候,一直返回“发送失败”,在此记录,以免以后采坑

webapi 端代码:

         /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="fromMail">发件人邮箱</param>
        /// <param name="toMail">收件人邮箱</param>
        /// <param name="authorizationCode">发件人授权码</param>
        /// <param name="replyTo">收件人回复邮件默认接收地址(不设置也可以)</param>
        /// <param name="ccMail">邮件抄送人</param>
        /// <param name="filePath">附件地址</param>
        /// <param name="sendPeopleCall">收件人称呼</param>
        /// <param name="collectSampleDate">收样时间</param>
        /// <returns></returns>
        public MsgModel SendMails(string fromMail,List<string> toMail,string authorizationCode,string replyTo, List<string> ccMail,List<string> filePath,string sendPeopleCall,string collectSampleDate)
        {
            
            try
            {
                //实例化发送邮件类
                MailMessage mailMessage = new MailMessage();
                //邮件的优先级 分为 low normal high 通常用Normal即可
                mailMessage.Priority = MailPriority.Normal;
                //发送人邮件地址
                mailMessage.From = new MailAddress(fromMail);
                //收件人邮件地址 //考虑群发邮件
                foreach(var r in toMail)
                {
                    mailMessage.To.Add(new MailAddress(r));
                }
                if (replyTo == "" || replyTo == null)
                {
                    replyTo = fromMail;
                }

                //对方回复邮件时默认的接收地址(可以不设置)
                //mailMessage.ReplyTo = new MailAddress(replyTo);
                if (ccMail != null)
                {
                    //邮件抄送  支持 群发 抄送
                    foreach (var r in ccMail)
                    {
                        mailMessage.CC.Add(r);
                    }
                }
                //如果邮件标题包含中文,这里要设置编码方式 否则会出现乱码
                mailMessage.SubjectEncoding = Encoding.GetEncoding(936);
                //邮件正文是否是Html 格式
                mailMessage.IsBodyHtml = true;
                //邮件标题
                mailMessage.Subject = $@" REPORT-{collectSampleDate}";
                //邮件内容
                mailMessage.Body = $@"
                                    Dear {sendPeopleCall},
                                    ";

                mailMessage.Attachments.Clear();
                if (filePath != null&&filePath.Count>0)
                {
                    foreach (var r in filePath)
                    {
                        var urls = System.AppDomain.CurrentDomain.BaseDirectory.ToString() + r;//获取项目的绝对
                        //将附件添加到邮件
                        mailMessage.Attachments.Add(new Attachment(urls));
                        //获取设置此电子邮件的发送通知
                        mailMessage.DeliveryNotificationOptions = DeliveryNotificationOptions.OnSuccess;
                    }

                }
                //实例化 SmtpClient类
                SmtpClient client = new SmtpClient();
                client.Host = GetClientHost(fromMail);
                //使用安全加密连接
                client.EnableSsl = true;
                client.Port = 587;//默认是25 此处设置成587
                //不和请求一块发送
                client.UseDefaultCredentials = false;

                //client.DeliveryMethod = SmtpDeliveryMethod.Network;

                //验证发送人身份(发件人的邮箱,邮箱里生成的授权码)
                client.Credentials = new NetworkCredential(fromMail,authorizationCode);

                //如果发送失败,SMTP 服务器将发送 失败邮件告知fromEmail 
                mailMessage.DeliveryNotificationOptions= DeliveryNotificationOptions.OnFailure;

                client.Send(mailMessage);
                
                return new MsgModel
                {
                    Status = true,
                    Msg = "发送邮件成功" ,
                    Data = ""
                };
            }
            catch(Exception ex)
            {
                return new MsgModel
                {
                    Status = false,
                    Msg = "发送邮件失败!错误:" + ex.Message,
                    Data=""
                };
            }
          
        }
         /// <summary>
        /// 根据发送邮箱 识别发件服务器地址 
        /// </summary>
        /// <param name="fromEmail"></param>
        /// <returns></returns>
        public string GetClientHost(string fromEmail)
        {
            var host = "";
            if (fromEmail.Length != 0)
            {
                var addressStr = fromEmail.Trim().Split(new char[] { '@','.'});
                switch (addressStr[1])
                {
                    case "163":
                        host = "smtp.163.com";
                        break;
                    case "126":
                        host = "smtp.126.com";
                        break;
                    case "qq":
                        host = "smtp.qq.com";
                        break;
                    case "gmail":
                        host = "smtp.gmail.com";
                        break;
                    case "hotmail":
                        host = "smtp.live.com";//outlook邮箱
                                                      //client.Port = 587;
                        break;
                    case "foxmail":
                        host = "smtp.foxmail.com";
                        break;
                    case "sina":
                        host = "smtp.sina.com.cn";
                        break;
                    default:
                        host = "smtp.exmail.qq.com";//qq企业邮箱
                        break;

                }
            }
            return host;
        }

发送邮箱,以及授权码都放在配置文件webconfig 中,这里不展示。

另外:项目是部署到阿里服务器的,此项目邮件发送端口是587,因此在阿里服务器需要设置允许端口587进出。

在此基础上本地调试可正常发送,部署到服务器上就发送失败,经过查阅相关博客,不断的尝试其他博客的解决方法,其中一个博客中说:本地调试发送了邮件成功后,tx那边认为你当前发送邮件的地址为常用的邮件发送地址,再部署到服务器上的时候,tx就认为你是发送广告,就被禁止当前地址发送邮箱,需要解除禁止。禁止一时半会不知道咋去解禁,于是尝试着替换一个qq邮箱账号进行发送邮件,结果真的是发送成功了。

.net 发送qq邮件

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