使用 Hotmail SMTP C# 发送电子邮件在本地有效，但在实时服务器上无效

Question

我有一个 asp.net web API 用于将电子邮件发送到另一个电子邮件 (gmail)，另一个前端项目调用它 API，它发送时效果很好当后端和前端项目在本地时按预期发送电子邮件，但它不适用于实时托管 (SmarterAsp)。

这是我的大火和代码：

    //This method only sends email as per the data sent
    [System.Web.Http.HttpPost]
    public EmailResponseModel SendEmail()
    {
   
        NetworkCredential basicCredential =
        new NetworkCredential("mysenderemail@hotmail.com", "mysenderemailpassword");
        MailMessage ProviderMail = new MailMessage();

        ProviderMail.From = new MailAddress("mysenderemail@hotmail.com");
        ProviderMail.To.Add("myemail@gmail.com");


        ProviderMail.Subject = "Title";
        ProviderMail.IsBodyHtml = true;
        ProviderMail.Body = "Body";

        SmtpClient smtp = new SmtpClient();
        smtp.Port = 587;
        smtp.UseDefaultCredentials = false;
        smtp.Host = "smtp.office365.com";
        smtp.Credentials = basicCredential;
        smtp.EnableSsl = true;


        try
        {
            smtp.Send(ProviderMail);
            return Response;
        }
        catch (Exception ex)
        {
            return Response;
        }
        finally
        {
            smtp.Dispose();
        }
    }

这是我从 API:

得到的错误

System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.57 SMTP

我尝试了很多事情，例如：

尝试了这些主机 smtp.live.com、smtp.office365.com、smtp-mail.live.com 和其他主机
尝试了其他端口，例如 25
试图将此 UseDefaultCredentials 设置为 false 和 true
确保用户名和密码正确
从SMPT Config代码的顺序确定

我为此花了好几个小时，但我没有找到任何解决方案！我需要任何见解。

Answer 1

好的，问题是 Hotmail 检测到我的帐户有异常行为，这是因为我试图在本地和 Live 主机上发送电子邮件，所以他们阻止了我并向我发送了一封电子邮件，如果那个人试图发送电子邮件是不是我，一旦我确认是我，一切都很好。

Answer 2

您可以选择使用 SmarterAsp SMTP 服务器吗？

来自他们的网站：

<%@ Page Language="VB" %> 
<%@ Import Namespace="System.Net.Mail" %> 
<script runat="server"> 
    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) 
 
        Dim strFrom = "postmaster@yourdomain.com"  ''IMPORTANT: This must be same as your smtp authentication address.
        Dim strTo = "postmaster@yourdomain.com" 
        Dim MailMsg As New MailMessage(New MailAddress(strFrom.Trim()), New MailAddress(strTo)) 
        MailMsg.BodyEncoding = Encoding.Default 
        MailMsg.Subject = "This is a test" 
        MailMsg.Body = "This is a sample message using SMTP authentication" 
        MailMsg.Priority = MailPriority.High 
        MailMsg.IsBodyHtml = True 
        'Smtpclient to send the mail message 
 
        Dim SmtpMail As New SmtpClient 
        Dim basicAuthenticationInfo As New System.Net.NetworkCredential("postmaster@mydoamin.com", "password") 

''IMPORANT:  Your smtp login email MUST be same as your FROM address.
 
        SmtpMail.Host = "mail.yourdomain.com" 
        SmtpMail.UseDefaultCredentials = False 
        SmtpMail.Credentials = basicAuthenticationInfo
        SmtpMail.Port = 25;    //alternative port number is 8889
        SmtpMail.EnableSsl = false;
 
        SmtpMail.Send(MailMsg) 
        lblMessage.Text = "Mail Sent"     
    End Sub 
</script> 
<html> 
<body> 
    <form runat="server"> 
        <asp:Label id="lblMessage" runat="server"></asp:Label> 
    </form> 
</body> 
</html>

使用 Hotmail SMTP C# 发送电子邮件在本地有效，但在实时服务器上无效

Sending email using Hotmail SMTP C# works locally, but doesn't on live server

c#

asp.net

email

smtp

hotmail