Office365 in C# from Windows Store Apps - XAML - UWP¶

In previous section, I introduced how to send email using Yahoo account. In this section, I will introduce how to use your Hotmail/MSN Live/Outlook/Office365 account to send email in C#.

Sections:

Introduction
[C# - Send email using Hotmail/MSN Live account over TLS connection]
Hotmail SMTP OAUTH
Send Email using Office 365
App Password and SmtpClientAuthenticationDisabled
[C# - Send email using Office365 account over TLS connection]
Office365 EWS OAUTH

Introduction¶

Hotmail/MSN Live/Outlook.com SMTP server address is smtp.office365.com. It requires TLS connection to do user authentication, and you should use your Hotmail/MSN Live/Outlook.com email address as the user name for ESMTP authentication. For example: your email is liveid@hotmail.com, and then the user name should be liveid@hotmail.com.

Server	Port	SSL/TLS
smtp.office365.com	25, 587	TLS

Note

Remarks: All of samples in this section are based on first section: Send email in A simple C# XAML Windows Store App project. To compile and run the following example codes successfully, please click here to learn how to create the test project and add reference of EASendMail to your project.

[C# - Send email using Hotmail/MSN Live account over TLS connection]¶

The following example codes demonstrate how to use EASendMail SMTP component to send email using Hotmail/MSN Live account.

Note

To get the full sample projects, please refer to Samples section.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

// Add EASendMail and Tasks Namespace
using System.Threading.Tasks;
using EASendMail;

namespace CSharp_Windows_Store_App
{
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
        }

        private async void btnSend_Click(object sender, RoutedEventArgs e)
        {
            btnSend.IsEnabled = false;
            await Send_Email();
            btnSend.IsEnabled = true;
        }

        private async Task Send_Email()
        {
            String Result = "";
            try
            {
                SmtpMail oMail = new SmtpMail("TryIt");
                SmtpClient oSmtp = new SmtpClient();

                // Set your hotmail/live/outlook.com email address
                oMail.From = new MailAddress("liveid@hotmail.com");

                // Add recipient email address, please change it to yours
                oMail.To.Add(new MailAddress("support@emailarchitect.net"));

                // Set email subject and email body text
                oMail.Subject = "test email from C# XAML project";
                oMail.TextBody = "this is a test email sent from Windows Store App using Hotmail.";

                // Hotmail SMTP server
                SmtpServer oServer = new SmtpServer("smtp.office365.com");

                // User and password for ESMTP authentication
                oServer.User = "liveid@hotmail.com";


                // If you got authentication error, try to create an app password instead of your user password.
                // https://support.microsoft.com/en-us/account-billing/using-app-passwords-with-apps-that-don-t-support-two-step-verification-5896ed9b-4263-e681-128a-a6f2979a7944
                oServer.Password = "your password or app password";

                // Set 587 port, if you want to use 25 port, please change 587 to 25
                oServer.Port = 587;

                // detect SSL/TLS type automatically
                oServer.ConnectType = SmtpConnectType.ConnectSSLAuto;

                await oSmtp.SendMailAsync(oServer, oMail);
                Result = "Email was sent successfully!";
            }
            catch (Exception ep)
            {
                Result = String.Format("Failed to send email with the following error: {0}", ep.Message);
            }

            // Display Result by Diaglog box
            Windows.UI.Popups.MessageDialog dlg = new
                Windows.UI.Popups.MessageDialog(Result);

            await dlg.ShowAsync();
        }
    }
}

Hotmail SMTP OAUTH¶

If your account enabled two-factor authentication, you cannot login your account by normal user authentication, you should use SMTP OAUTH or App Password.

Microsoft Live SMTP servers (Hotmail, Oultook personal account) have been extended to support authorization via the industry-standard OAuth 2.0 protocol. Using OAUTH protocol, user can do authentication by Microsoft Web OAuth instead of inputting user and password directly in application. This way is more secure, but a little bit complex.

Using Microsoft Hotmail SMTP OAUTH

Or you can generate App Passwords and use this app password instead of your user password.

Send Email using Office 365¶

Office 365 SMTP server uses 587 port and explicit SSL (TLS) connection.

Server	Port	SSL/TLS
smtp.office365.com	25, 587 (recommended)	TLS

App Password and SmtpClientAuthenticationDisabled¶

If your account enabled two-factor authentication, you cannot login your account by normal user authentication, you should create an App Passwords and use this App Password instead of the user password.

You should also check if authenticated client SMTP submission (SMTP AUTH) is enabled:

Enable or disable authenticated client SMTP submission (SMTP AUTH) in Exchange Online.

[C# - Send email using Office365 account over TLS connection]¶

The following example codes demonstrate how to use EASendMail SMTP component to send email using Office365 account. To get the full samples of EASendMail, please refer to Samples section.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

// Add EASendMail and Tasks Namespace
using System.Threading.Tasks;
using EASendMail;

namespace CSharp_Windows_Store_App
{
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
        }

        private async void btnSend_Click(object sender, RoutedEventArgs e)
        {
            btnSend.IsEnabled = false;
            await Send_Email();
            btnSend.IsEnabled = true;
        }

        private async Task Send_Email()
        {
            String Result = "";
            try
            {
                SmtpMail oMail = new SmtpMail("TryIt");
                SmtpClient oSmtp = new SmtpClient();

                // Set your email address
                oMail.From = new MailAddress("myid@mydomain");

                // Add recipient email address, please change it to yours
                oMail.To.Add(new MailAddress("support@emailarchitect.net"));

                // Set email subject and email body text
                oMail.Subject = "test email from C# XAML project";
                oMail.TextBody = "this is a test email sent from Windows Store App using Office365.";

                // Office365 SMTP server
                SmtpServer oServer = new SmtpServer("smtp.office365.com");

                // User and password for ESMTP authentication
                oServer.User = "myid@mydomain";


                // If you got authentication error, try to create an app password instead of your user password.
                // https://support.microsoft.com/en-us/account-billing/using-app-passwords-with-apps-that-don-t-support-two-step-verification-5896ed9b-4263-e681-128a-a6f2979a7944
                oServer.Password = "your password or app password";

                // use 587 port
                oServer.Port = 587;

                // detect SSL/TLS type automatically
                oServer.ConnectType = SmtpConnectType.ConnectSSLAuto;

                await oSmtp.SendMailAsync(oServer, oMail);
                Result = "Email was sent successfully!";
            }
            catch (Exception ep)
            {
                Result = String.Format("Failed to send email with the following error: {0}", ep.Message);
            }

            // Display Result by Diaglog box
            Windows.UI.Popups.MessageDialog dlg = new
                Windows.UI.Popups.MessageDialog(Result);

            await dlg.ShowAsync();
        }
    }
}

Office365 EWS OAUTH¶

If your account enabled two-factor authentication, you cannot login your account by normal user authentication, you should use SMTP OAUTH or App Password.

Microsoft Office365 EWS/SMTP servers have been extended to support authorization via the industry-standard OAuth 2.0 protocol. Using OAUTH protocol, user can do authentication by Microsoft Web OAuth instead of inputting user and password directly in application. This way is more secure, but a little bit complex.

Using Microsoft Office365 EWS OAUTH

Or you can generate App Passwords and use this app password instead of your user password.

Next Section

At next section I will introduce how to send email with HTML format in C#.

Tutorial Index

Send Email using Hotmail/MSN Live/Outlook/Office365 in C# from Windows Store Apps - XAML - UWP¶

Introduction¶

[C# - Send email using Hotmail/MSN Live account over TLS connection]¶

Hotmail SMTP OAUTH¶

Send Email using Office 365¶

App Password and SmtpClientAuthenticationDisabled¶

[C# - Send email using Office365 account over TLS connection]¶

Office365 EWS OAUTH¶

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