无法使用 C 使用 Office 365 凭据发送电子邮件#

Question

我正在尝试使用C#使用我的Office 365凭据发送电子邮件。但是它无法发送并获得异常。

如何解决这个问题？可以从办公室365发送吗？

     foreach (var filename in files)
     {
           String userName = "[e-mail]";
           String password = "password";
           MailMessage mail = new MailMessage();
           SmtpClient SmtpServer = new SmtpClient("smtp.office365.com");
           mail.From = new MailAddress("[e-mail]");
           mail.To.Add("[e-mail]");
           mail.Subject = "Fwd: for " + filename;
           mail.Body = "mail with attachment";

           System.Net.Mail.Attachment attachment;
           attachment = new System.Net.Mail.Attachment(filename);
           mail.Attachments.Add(attachment);

           SmtpServer.Port = 587;
           SmtpServer.Credentials = new System.Net.NetworkCredential(userName, password);
           SmtpServer.EnableSsl = true;

           SmtpServer.Send(mail);
}

事务失败。服务器响应为：5.2.0 STOREDRV.Submission。异常：SendAsDeniedException。MapiExceptionSendAsDenied；由于消息为“无法提交消息”的永久异常，无法处理消息。

Answer 1

您将同时发送多少封电子邮件？

foreach （文件中的变量文件名）

通过https://outlook.office.com/api或https://outlook.office365.com/api访问的所有Outlook API的限制是每分钟60个请求，每个用户（或组），每个应用ID。因此，目前，开发人员只能从应用程序进行有限的API调用。阅读Microsoft博客文章，了解有关REST API调用限制的更多详细信息。

请尝试使用以下代码：

MailMessage msg = new MailMessage();
msg.To.Add(new MailAddress("[e-mail]", "SomeOne"));
msg.From = new MailAddress("[e-mail]", "You");
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 System.Net.NetworkCredential("your user name", "your password");
client.Port = 587; // You can use Port 25 if 587 is blocked (mine is!)
client.Host = "smtp.office365.com";
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.EnableSsl = true;
try
{
    client.Send(msg);
    lblText.Text = "Message Sent Succesfully";
}
catch (Exception ex)
{
    lblText.Text = ex.ToString();
}