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.net - 服务器响应是：smtp23.relay.iad3b.emailsrvr.com

问题描述

当我们从服务器发送电子邮件时出错，但在本地系统电子邮件中工作正常。

例外： 服务器响应是：smtp23.relay.iad3b.emailsrvr.com esmtp 不接受连接

        MailMessage MyMailMessage = new MailMessage();
        MyMailMessage.From = new MailAddress("noreply@xxxx.com");
        MyMailMessage.To.Add(To);
        MyMailMessage.Subject = Subject;
        MyMailMessage.Body = Template1;
        MyMailMessage.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure |
                    DeliveryNotificationOptions.OnSuccess |
                    DeliveryNotificationOptions.Delay;
        MyMailMessage.IsBodyHtml = true;
        SmtpClient SMTPServer = new SmtpClient("smtp.emailsrvr.com");
        SMTPServer.Port = 8025;
        SMTPServer.Credentials = new System.Net.NetworkCredential("noreply@xxx.com","xxx");
        SMTPServer.EnableSsl = false;
        SMTPServer.Send(MyMailMessage);

标签： .net

解决方案

如下链接所示，可能错误是发件人IP地址被怀疑发送垃圾邮件并被列入黑名单。 https://support.mailhostbox.com/email-administrators-guide-error-codes/#:~:text=When%20sending%20an%20email%20to,sending%20spam%20and%20is%20blacklisted.&text=A% 20problem%20has%20occurred%20during,to%20this%20e%2Dmail%20address。

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