Question

我已经从GoDaddy购买了“ Office 365电子邮件必备”计划，用于发送电子邮件。我能够在Outlook邮箱中发送和接收这些电子邮件，但不能通过C＃代码以编程方式进行。我不断收到错误“

SMTP服务器需要安全连接，否则客户端将无法连接已验证。服务器响应为：5.7.57 SMTP；客户不是经过验证可在MAIL FROM期间发送匿名邮件 [BMXPR01CA0092.INDPRD01.PROD.OUTLOOK.COM]“

MailMessage msg = new MailMessage();
        msg.To.Add(new MailAddress("xxx@gmail.com", "xxx"));
        msg.From = new MailAddress("xxx@mydomain.com", "Admin");
        msg.Subject = "This is a Test Mail";
        msg.Body = "This is a test message using Exchange OnLine";
        msg.IsBodyHtml = true;

        SmtpClient client = new SmtpClient();
        client.UseDefaultCredentials = false;
        client.Credentials = new NetworkCredential("xxx@mydomain.com", "mypassword","mydomain.com");
        client.Port = 587;
        client.Host = "smtp.office365.com";
        client.DeliveryMethod = SmtpDeliveryMethod.Network;
        client.EnableSsl = true;
        //Send the msg
        try
        {
            client.Send(msg);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }

这是配置文件中的邮件设置条目-

<mailSettings>
<smtp from="xxx@mydomain.com">
  <network host="smtp.office365.com" port="587" />
</smtp>
</mailSettings>

我在Outlook中看到的设置是-

服务器名称：smtp.office365.com 端口：587 加密方式：STARTTLS

或者，我也尝试使用用户ID代替网络凭据中的实际电子邮件地址，但这也不起作用。

我还尝试在GoDaddy中使用MX Txt记录，即服务器“ relay-hosting.secureserver.net”和端口25，但没有运气。

我还根据链接http://edudotnet.blogspot.com/2014/02/smtp-microsoft-office-365-net-smtp.html更改了“邮箱委派”中的设置，但这也无济于事。

请帮助我这些步骤中我缺少的东西。

Answer 1

在此花费数小时后，我发现 Godaddy 配置的 Office 365 邮件 ID 的 smtp 主机是“smtpout.secureserver.net”。

还将客户端编程为关闭连接，如下所示：

SmtpClient client = new SmtpClient {

   Host = "smtpout.secureserver.net",

   Credentials = new NetworkCredential("USERNAME@DOMAIN.COM", "YOURPWD"),

   Port = 587,

   EnableSsl = true,

   Timeout = 10000

};

经过这些更新后，它将起作用！！！享受！

控制台应用程序代码示例！

static void Main(string[] args)
        {
            try
            {
                ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

                string userId = "username@domainname.com";
                string _pwd = "mypassword";
                var toAddress = "touseremailaddress";
                SmtpClient client = new SmtpClient
                {
                    Host = "smtpout.secureserver.net",
                    Credentials = new NetworkCredential(userId, _pwd),
                    Port = 587,
                    EnableSsl = true
                };
               
                var Msg = new MailMessage();
                Msg.From = new MailAddress(userId);
                Msg.To.Add(new MailAddress(toAddress.ToString()));
                Msg.Subject = "TEST EMAIL";
                Msg.Body = "Hello world";

                Console.WriteLine("start to send email over SSL...");
                client.Send(Msg);
                Console.WriteLine("email was sent successfully!");
                Console.ReadLine();
            }
            catch (Exception ep)
            {
                Console.WriteLine("failed to send email with the following error:");
                Console.WriteLine(ep.Message);
                Console.ReadLine();
            }
        }

Answer 2

尝试将SMTP服务器名称更改为Outlook.office365.com，而不是smtp.office365.com

无法从GoDaddy配置的Office 365帐户使用C＃代码发送电子邮件

2 个答案: