Delphi - Retrieve Email using Microsoft OAuth 2.0 (Modern Authentication) + EWS/IMAP4 Protocol from Office 365 Account

You can retrieve email using traditional user/password authentication from Office 365 account by EWS or IMAP4 Protocol.

However Microsoft will disable traditional user authentication in the future, switching to Microsoft OAuth (Modern Authentication) is strongly recommended now.

Installation

Before you can use the following sample codes, you should download the EAGetMail Installer and install it on your machine at first. Full sample projects are included in this installer.

Add Reference

To better demonstrate how to retrieve email and parse email, let’s create a Delphi Standard EXE project at first, then add a TButton on the Form, double-click this button. It is like this:

Delphi console project

To use EAGetMail ActiveX Object in your Delphi project, the first step is “Add Unit file of EAGetMail to your project”. Please go to C:\Program Files\EAGetMail\Include\delphi or C:\Program Files (x86)\EAGetMail\Include\delphi folder, find EAGetMailObjLib_TLB.pas, and then copy this file to your project folder.

// include EAGetMailObjLib_TLB unit to your Delphi Project
unit Unit1;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, EAGetMailObjLib_TLB, StdCtrls;

Then you can start to use it in your Delphi Project.

You can also create EAGetMailObjLib_TLB.pas manually by Delphi like this:

  • Delphi 7 or eariler version

    First of all, create a standard delphi project: select menu Project -> Import Type Library, checked EAGetMail ActiveX Object and click Create Unit. Then include EAGetMailObjLib_TLB in your project.

    add reference in Delphi
  • Delphi XE or later version

    First of all, create a standard delphi project: select menu Component -> Import component... -> Import a type library -> checked EAGetMail ActiveX Object, have Generate Component Wrapper checked and click “Create Unit”. Then include EAGetMailObjLib_TLB in your project.

Create your application in Azure Portal

To use Microsoft/Office365/Live OAuth (Modern Authentication) in your application, you must create a application in https://portal.azure.com.

  • Sign in to the Azure portal using either a work or school account or a personal Microsoft account.

  • If your account gives you access to more than one tenant, select your account in the top right corner, and set your portal session to the Azure AD tenant that you want.

  • In the left-hand navigation pane, select the Azure Active Directory service, and then select App registrations -> New registration.

    azure portal new app registration
  • When the Register an application page appears, enter your application’s registration information:

    azure portal application registration
    • Name - Enter a meaningful application name that will be displayed to users of the app.
    • Supported account types - Select which accounts you would like your application to support. Because we need to support all Office 365 and LIVE SDK (hotmail, outlook personal account) select Accounts "in any organizational directory and personal Microsoft accounts".
  • Redirect URI (optional)

    Select the type of app you’re building, Web or Public client (mobile & desktop), and then enter the redirect URI (or reply URL) for your application.

    For web applications, provide the base URL of your app. For example, http://localhost:31544 might be the URL for a web app running on your local machine. Users would use this URL to sign in to a web client application.

    For public client applications, provide the URI used by Azure AD to return token responses. Enter a value specific to your application, such as myapp://auth.

  • Client Id/secrets

    After you registered your application, Azure AD assigns a unique application (client) ID to your app, and you’re taken to your application’s Overview page. click "Certificates and secrets" -> "client secrets" and add a new client secret.

Important

Please store "client secret" by yourself, because it is hidden when you view it at next time.

API Permission

  • Click "API Permission" -> "Add a permission" -> "Exchange" -> "Delegated Permission" -> "Check EWS.AccessAsUser.All";
  • "Add a permission" -> "Microsoft Graph" -> "Delegated Permission" -> "User.Read", "email", "offline_access", "openid", "profile", SMTP.Send, IMAP.AccessAsUser.All, POP.AccessAsUser.All.
azure application api permission

Authentication

  • Click "Authentication"

    • Implicit grant: check "Access tokens" and "ID tokens";
    • Redirect URI: input the url to get authorization code, for native desktop application, you don’t have to add redirect uri.
  • Mobile and desktop applications -> Redirect Uri, please check or add the following URI.

    https://login.microsoftonline.com/common/oauth2/nativeclient
    https://login.live.com/oauth20_desktop.srf
    http://127.0.0.1
    

    Note

    • https://login.live.com/oauth20_desktop.srf is used for Live SDK, http://127.0.0.1 is used for local Http Listener.
  • Supported account types:

    Select Accounts in any organizational directory (Any Azure AD directory - Multitenant) and personal Microsoft accounts (e.g. Skype, Xbox)

  • Advanced settings:

    Set both "Live SDK Support" and "Treat application as a public client" to "Yes".

azure application Authentication Overview

Above client id and client secret support both "Office365 + IMAP/EWS" and "Live (hotmail, outlook personal account) + IMAP",

Use client id and client secret to request access token

You can use client id and client secret to get the user email address and access token like this:

  • Your application uses a web browser/browser control to open Microsoft OAUTH URL;
  • User inputs user and password in Microsoft Web Authentication Page, and then Microsoft returns access token back to your application;
  • Your application uses access token to access Office 365 EWS/IMAP4 server.
  • You can find full example codes in EAGetMail Installation Path\Samples_{Programming language/Developer Tool} project.

Important

You should create your client id and client secret, do not use the client id from example codes in production environment, it is used for test purpose. If you got "This app isn't verified" information, please click "Advanced" -> Go to ... for test.

Delphi - Retrieve Email Using Microsoft OAuth + Office 365 IMAP4 Protocol

Here is a console application which demonstrates how to use Microsoft OAuth to do user authentication and retrieve email using IMAP4 protocol.

Note

This sample cannot handle the event of Web Browser is closed by user manually before authentication is completed. You can refer to the better sample project which uses Web Browser Control in EAGetMail installation path.

program Project1;
{$APPTYPE CONSOLE}

uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, ActiveX, MSXML2_TLB, EAGetMailObjLib_TLB;

const
    MailServerPop3 = 0;
    MailServerImap4 = 1;
    MailServerEWS = 2;
    MailServerDAV = 3;

    // Auth type
    MailServerAuthLogin = 0;
    MailServerAuthCRAM5 = 1;
    MailServerAuthNTLM = 2;
    MailServerAuthXOAUTH2 = 3;

    CRYPT_MACHINE_KEYSET = 32;
    CRYPT_USER_KEYSET = 4096;
    CERT_SYSTEM_STORE_CURRENT_USER = 65536;
    CERT_SYSTEM_STORE_LOCAL_MACHINE = 131072;

    // GetMailInfosParam Flags
    GetMailInfos_All = 1;
    GetMailInfos_NewOnly = 2;
    GetMailInfos_ReadOnly = 4;
    GetMailInfos_SeqRange = 8;
    GetMailInfos_UIDRange = 16;
    GetMailInfos_PR_ENTRYID = 32;
    GetMailInfos_DateRange = 64;
    GetMailInfos_OrderByDateTime = 128;

    // client configuration
    // You should create your client id and client secret,
    // do not use the following client id in production environment, it is used for test purpose only.
    clientID = 'eccbabb2-3377-4265-85c1-ea2fb515f075';
    clientSecret = 'QaR_RR:-5WqTY[nni9pdBr9xVybqrAu4';
    // use IMAP scope
    scope = 'https://outlook.office.com/IMAP.AccessAsUser.All%20email%20openid';
    authUri = 'https://login.microsoftonline.com/common/oauth2/v2.0/authorize';
    tokenUri = 'https://login.microsoftonline.com/common/oauth2/v2.0/token';

function GetConsoleWindow: HWND; stdcall;
    external kernel32 name 'GetConsoleWindow';

procedure RetrieveEmailWithXOAUTH2(email: string; accesstoken: string);
var
    oServer: TMailServer;
    oClient: TMailClient;
    oTools: TTools;
    oMail: IMail;
    infos: IMailInfoCollection;
    oInfo: IMailInfo;
    localInbox, fileName: WideString;
    i: Integer;
begin
    try
        // set current thread code page to system default code page.
        SetThreadLocale(GetSystemDefaultLCID());
        oTools := TTools.Create(nil);

        // Create a folder named "inbox" under
        // current directory to store the email files
        localInbox := GetCurrentDir() + '\inbox';
        oTools.CreateFolder(localInbox);

        oServer := TMailServer.Create(nil);
        // Office 365 Server
        oServer.Server := 'outlook.office365.com';
        // Use OAUTH 2.0
        oServer.AuthType := MailServerAuthXOAUTH2;

        oServer.User := email;
        // Use access token as password
        oServer.Password := accesstoken;
        // Use IMAP Protocol
        oServer.Protocol := MailServerImap4;

        // Enable SSL Connection
        oServer.SSLConnection := true;
        // Set IMAP SSL Port
        oServer.Port := 993;

        oClient := TMailClient.Create(nil);
        oClient.LicenseCode := 'TryIt';

        writeln('Connecting ' + oServer.Server + ' ...');
        oClient.Connect1(oServer.DefaultInterface);
        writeln('Connected!');

        // Get new email only, if you want to get all emails, please remove this line
        oClient.GetMailInfosParam.GetMailInfosOptions := GetMailInfos_NewOnly;

        infos := oClient.GetMailInfoList();
        writeln(Format('Total %d email(s)', [infos.Count]));

        for i := 0 to infos.Count - 1 do
        begin
            oInfo := infos.Item[i];

            writeln(Format('Index: %d; Size: %d; UIDL: ' + oInfo.UIDL,
            [oInfo.Index, oInfo.Size]));

            // Generate a random file name by current local datetime,
            // You can use your method to generate the filename if you do not like it
            fileName := localInbox + '\' + oTools.GenFileName(i) + '.eml';

            // Receive email from IMAP server
            oMail := oClient.GetMail(oInfo);

            writeln('From: ' + oMail.From.Address + #13#10 +
                'Subject: ' + oMail.Subject);

            // Save email to local disk
            oMail.SaveAs(fileName, true);

            // Mark email as read to prevent retrieving this email again.
            oClient.MarkAsRead(oInfo, true);

            // If you want to delete current email, please use Delete method instead of MarkAsRead
            // oClient.Delete(oInfo);
        end;

        // Quit and expunge emails marked as deleted from IMAP server
        oClient.Quit;
    except
        on ep:Exception do
        writeln('Error: ' + ep.Message);
    end;

end;

// path?parameter1=value1&parameter2=value2#anchor;
function ParseParameter(URL: string; ParameterName: string):string;
var
    query, parameter, code: string;
    i, mypos, parameterNameLength: integer;
    list: TStrings;
begin
    result := '';
    parameterNameLength := Length(ParameterName);
    query := URL;
    mypos := pos('?', query);

    if(mypos > 0) then
        query := Copy(query, mypos + 1, length(query) - mypos);

    list := TStringList.Create;
    ExtractStrings(['&'], [], PChar(query), list);
    for i:= 0 to list.Count - 1 do
    begin
        parameter := list[i];
        if (length(parameter) > parameterNameLength) and
            (LowerCase(Copy(parameter, 1, parameterNameLength)) = ParameterName) then
        begin
            code := Copy(parameter, parameterNameLength + 1, length(parameter) - parameterNameLength);
            mypos := pos('#', code);
            if(mypos > 0) then
                code := Copy(code, 1, mypos - 1);

            result := code;
            exit;
        end
    end;

end;

function RequestAccessToken(code: string; redirectUri: string): string;
var
    httpRequest: TServerXMLHTTP60;
    tokenRequestBody: OleVariant;
    status: integer;
begin
    writeln('Exchanging code for tokens...');
    result := '';

    try
        httpRequest := TServerXMLHTTP60.Create(nil);
        if (httpRequest = nil) then
        begin
            writeln('Failed to create XML HTTP Object, please make sure you install MSXML 3.0 on your machine.');
            exit;
        end;

        tokenRequestBody := 'code=';
        tokenRequestBody := tokenRequestBody + code;
        tokenRequestBody := tokenRequestBody + '&redirect_uri=';
        tokenRequestBody := tokenRequestBody + redirectUri;
        tokenRequestBody := tokenRequestBody + '&client_id=';
        tokenRequestBody := tokenRequestBody + clientID;
        tokenRequestBody := tokenRequestBody + '&grant_type=authorization_code';

        httpRequest.setOption(2, 13056);
        httpRequest.open('POST', tokenUri, true);
        httpRequest.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        httpRequest.send(tokenRequestBody);

        while( httpRequest.readyState <> 4 ) do
            httpRequest.waitForResponse(1);

        status := httpRequest.status;
        result := httpRequest.responseText;

        if (status < 200) or (status >= 300) then
            writeln('Failed to get access token from server: ' + httpRequest.responseText);

    except
        writeln('Server response timeout (access token) or exception.');
        exit;
    end;

end;

procedure DoOauthAndRetrieveEmail();
var
    httpListener: THttpListener;
    browserUi: TBrowserUi;
    parser: TOAuthResponseParser;
    szUri, requestUri: string;
    authorizationRequest: string;
    error, code: string;
    responseText: string;
    user, accessToken: string;
begin

    httpListener := THttpListener.Create(nil);

    // Creates a redirect URI using an available port on the loopback address.
    if (not httpListener.Create1('127.0.0.1', 0)) then
    begin
        writeln('Failed to listen on ' + httpListener.GetLastError());
        exit;
    end;

    szUri := Format('http://127.0.0.1:%d', [httpListener.ListenPort]);
    writeln('listen on ' + szUri + ' ...');

    // Creates the OAuth 2.0 authorization request.
    authorizationRequest := authUri;
    authorizationRequest := authorizationRequest + '?response_type=code&scope=';
    authorizationRequest := authorizationRequest + scope;
    authorizationRequest := authorizationRequest + '&redirect_uri=';
    authorizationRequest := authorizationRequest + szUri;
    authorizationRequest := authorizationRequest + '&client_id=';
    authorizationRequest := authorizationRequest + clientID;
    authorizationRequest := authorizationRequest + '&prompt=login';

    writeln('open ' + authorizationRequest + ' ...');

    // Opens request in the browser.
    browserUi := TBrowserUi.Create(nil);
    browserUi.OpenUrl(authorizationRequest);

    // Waits for the OAuth authorization response.
    if not (httpListener.GetRequestUrl(-1)) then
    begin
        writeln('Failed to get authorization response ' + httpListener.GetLastError());
        exit;
    end;

    // Brings the Console to Focus.
    SetForegroundWindow(GetConsoleWindow());

    // Send response and stop http listener.
    httpListener.SendResponse('200',
        'text/html; charset=utf-8',
        '<html><head></head><body>Please return to the app and close current window.</body></html>');
    httpListener.Close();

    requestUri := httpListener.RequestUrl;
    writeln('RequestUri: ' + requestUri);

    // Checks for errors.
    error := ParseParameter(requestUri, 'error=');
    if (error <> '') then
    begin
        writeln('OAuth authorization error: ' + error);
        exit;
    end;

    // Check authorization code
    code := ParseParameter(requestUri, 'code=');
    if (code = '') then
    begin
        writeln('Malformed authorization response: ' + requestUri);
        exit;
    end;

    writeln;
    writeln('Authorization code: ' + code);

    responseText := RequestAccessToken(code, szUri);
    writeln(responseText);

    parser := TOAuthResponseParser.Create(nil);
    parser.Load(responseText);

    user := parser.EmailInIdToken;
    accessToken := parser.AccessToken;

    if (accessToken = '') then
    begin
        writeln('Failed to request access token, return!');
        exit;
    end;

    writeln('User: ' + user);
    writeln('AccessToken:' + accessToken);

    RetrieveEmailWithXOAUTH2(user, accessToken);
end;

begin

    CoInitialize(nil);

    writeln('+------------------------------------------------------------------+');
    writeln('  Sign in with MS OAuth');
    writeln('   If you got "This app is not verified" information in Web Browser, ');
    writeln('      click "Advanced" -> Go to ... to continue test.');
    writeln('+------------------------------------------------------------------+');
    writeln('');

    writeln('Press ENTER key to sign in...');
    readln;

    DoOauthAndRetrieveEmail();

    writeln('Press ENTER key to quit...');
    readln;

end.

Delphi - Retrieve Email Using Microsoft OAuth + Office 365 EWS Protocol

Here is a console application which demonstrates how to use Microsoft OAuth to do user authentication and retrieve email using EWS protocol.

Note

This sample cannot handle the event of Web Browser is closed by user manually before authentication is completed. You can refer to the better sample project which uses Web Browser Control in EAGetMail installation path.

program Project1;
{$APPTYPE CONSOLE}

uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, ActiveX, MSXML2_TLB, EAGetMailObjLib_TLB;

const
    MailServerPop3 = 0;
    MailServerImap4 = 1;
    MailServerEWS = 2;
    MailServerDAV = 3;

    // Auth type
    MailServerAuthLogin = 0;
    MailServerAuthCRAM5 = 1;
    MailServerAuthNTLM = 2;
    MailServerAuthXOAUTH2 = 3;

    CRYPT_MACHINE_KEYSET = 32;
    CRYPT_USER_KEYSET = 4096;
    CERT_SYSTEM_STORE_CURRENT_USER = 65536;
    CERT_SYSTEM_STORE_LOCAL_MACHINE = 131072;

    // GetMailInfosParam Flags
    GetMailInfos_All = 1;
    GetMailInfos_NewOnly = 2;
    GetMailInfos_ReadOnly = 4;
    GetMailInfos_SeqRange = 8;
    GetMailInfos_UIDRange = 16;
    GetMailInfos_PR_ENTRYID = 32;
    GetMailInfos_DateRange = 64;
    GetMailInfos_OrderByDateTime = 128;

    // client configuration
    // You should create your client id and client secret,
    // do not use the following client id in production environment, it is used for test purpose only.
    clientID = 'eccbabb2-3377-4265-85c1-ea2fb515f075';
    clientSecret = 'QaR_RR:-5WqTY[nni9pdBr9xVybqrAu4';
    // use EWS scope
    scope = 'https://outlook.office.com/EWS.AccessAsUser.All%20email%20openid';
    authUri = 'https://login.microsoftonline.com/common/oauth2/v2.0/authorize';
    tokenUri = 'https://login.microsoftonline.com/common/oauth2/v2.0/token';

function GetConsoleWindow: HWND; stdcall;
    external kernel32 name 'GetConsoleWindow';

procedure RetrieveEmailWithXOAUTH2(email: string; accesstoken: string);
var
    oServer: TMailServer;
    oClient: TMailClient;
    oTools: TTools;
    oMail: IMail;
    infos: IMailInfoCollection;
    oInfo: IMailInfo;
    localInbox, fileName: WideString;
    i: Integer;
begin
    try
        // set current thread code page to system default code page.
        SetThreadLocale(GetSystemDefaultLCID());
        oTools := TTools.Create(nil);

        // Create a folder named "inbox" under
        // current directory to store the email files
        localInbox := GetCurrentDir() + '\inbox';
        oTools.CreateFolder(localInbox);

        oServer := TMailServer.Create(nil);
        // Office 365 Server
        oServer.Server := 'outlook.office365.com';
        // Use OAUTH 2.0
        oServer.AuthType := MailServerAuthXOAUTH2;

        oServer.User := email;
        // Use access token as password
        oServer.Password := accesstoken;
        // Use EWS Protocol
        oServer.Protocol := MailServerEWS;

        // Enable SSL Connection
        oServer.SSLConnection := true;

        oClient := TMailClient.Create(nil);
        oClient.LicenseCode := 'TryIt';

        writeln('Connecting ' + oServer.Server + ' ...');
        oClient.Connect1(oServer.DefaultInterface);
        writeln('Connected!');

        // Get new email only, if you want to get all emails, please remove this line
        oClient.GetMailInfosParam.GetMailInfosOptions := GetMailInfos_NewOnly;

        infos := oClient.GetMailInfoList();
        writeln(Format('Total %d email(s)', [infos.Count]));

        for i := 0 to infos.Count - 1 do
        begin
            oInfo := infos.Item[i];

            writeln(Format('Index: %d; Size: %d; UIDL: ' + oInfo.UIDL,
            [oInfo.Index, oInfo.Size]));

            // Generate a random file name by current local datetime,
            // You can use your method to generate the filename if you do not like it
            fileName := localInbox + '\' + oTools.GenFileName(i) + '.eml';

            // Receive email from IMAP server
            oMail := oClient.GetMail(oInfo);

            writeln('From: ' + oMail.From.Address + #13#10 +
                'Subject: ' + oMail.Subject);

            // Save email to local disk
            oMail.SaveAs(fileName, true);

            // Mark email as read to prevent retrieving this email again.
            oClient.MarkAsRead(oInfo, true);

            // If you want to delete current email, please use Delete method instead of MarkAsRead
            // oClient.Delete(oInfo);
        end;

        // Quit and expunge emails marked as deleted from IMAP server
        oClient.Quit;
    except
        on ep:Exception do
        writeln('Error: ' + ep.Message);
    end;

end;

// path?parameter1=value1&parameter2=value2#anchor;
function ParseParameter(URL: string; ParameterName: string):string;
var
    query, parameter, code: string;
    i, mypos, parameterNameLength: integer;
    list: TStrings;
begin
    result := '';
    parameterNameLength := Length(ParameterName);
    query := URL;
    mypos := pos('?', query);

    if(mypos > 0) then
        query := Copy(query, mypos + 1, length(query) - mypos);

    list := TStringList.Create;
    ExtractStrings(['&'], [], PChar(query), list);
    for i:= 0 to list.Count - 1 do
    begin
        parameter := list[i];
        if (length(parameter) > parameterNameLength) and
            (LowerCase(Copy(parameter, 1, parameterNameLength)) = ParameterName) then
        begin
            code := Copy(parameter, parameterNameLength + 1, length(parameter) - parameterNameLength);
            mypos := pos('#', code);
            if(mypos > 0) then
                code := Copy(code, 1, mypos - 1);

            result := code;
            exit;
        end
    end;

end;

function RequestAccessToken(code: string; redirectUri: string): string;
var
    httpRequest: TServerXMLHTTP60;
    tokenRequestBody: OleVariant;
    status: integer;
begin
    writeln('Exchanging code for tokens...');
    result := '';

    try
        httpRequest := TServerXMLHTTP60.Create(nil);
        if (httpRequest = nil) then
        begin
            writeln('Failed to create XML HTTP Object, please make sure you install MSXML 3.0 on your machine.');
            exit;
        end;

        tokenRequestBody := 'code=';
        tokenRequestBody := tokenRequestBody + code;
        tokenRequestBody := tokenRequestBody + '&redirect_uri=';
        tokenRequestBody := tokenRequestBody + redirectUri;
        tokenRequestBody := tokenRequestBody + '&client_id=';
        tokenRequestBody := tokenRequestBody + clientID;
        tokenRequestBody := tokenRequestBody + '&grant_type=authorization_code';

        httpRequest.setOption(2, 13056);
        httpRequest.open('POST', tokenUri, true);
        httpRequest.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        httpRequest.send(tokenRequestBody);

        while( httpRequest.readyState <> 4 ) do
            httpRequest.waitForResponse(1);

        status := httpRequest.status;
        result := httpRequest.responseText;

        if (status < 200) or (status >= 300) then
            writeln('Failed to get access token from server: ' + httpRequest.responseText);

    except
        writeln('Server response timeout (access token) or exception.');
        exit;
    end;

end;

procedure DoOauthAndRetrieveEmail();
var
    httpListener: THttpListener;
    browserUi: TBrowserUi;
    parser: TOAuthResponseParser;
    szUri, requestUri: string;
    authorizationRequest: string;
    error, code: string;
    responseText: string;
    user, accessToken: string;
begin

    httpListener := THttpListener.Create(nil);

    // Creates a redirect URI using an available port on the loopback address.
    if (not httpListener.Create1('127.0.0.1', 0)) then
    begin
        writeln('Failed to listen on ' + httpListener.GetLastError());
        exit;
    end;

    szUri := Format('http://127.0.0.1:%d', [httpListener.ListenPort]);
    writeln('listen on ' + szUri + ' ...');

    // Creates the OAuth 2.0 authorization request.
    authorizationRequest := authUri;
    authorizationRequest := authorizationRequest + '?response_type=code&scope=';
    authorizationRequest := authorizationRequest + scope;
    authorizationRequest := authorizationRequest + '&redirect_uri=';
    authorizationRequest := authorizationRequest + szUri;
    authorizationRequest := authorizationRequest + '&client_id=';
    authorizationRequest := authorizationRequest + clientID;
    authorizationRequest := authorizationRequest + '&prompt=login';

    writeln('open ' + authorizationRequest + ' ...');

    // Opens request in the browser.
    browserUi := TBrowserUi.Create(nil);
    browserUi.OpenUrl(authorizationRequest);

    // Waits for the OAuth authorization response.
    if not (httpListener.GetRequestUrl(-1)) then
    begin
        writeln('Failed to get authorization response ' + httpListener.GetLastError());
        exit;
    end;

    // Brings the Console to Focus.
    SetForegroundWindow(GetConsoleWindow());

    // Send response and stop http listener.
    httpListener.SendResponse('200',
        'text/html; charset=utf-8',
        '<html><head></head><body>Please return to the app and close current window.</body></html>');
    httpListener.Close();

    requestUri := httpListener.RequestUrl;
    writeln('RequestUri: ' + requestUri);

    // Checks for errors.
    error := ParseParameter(requestUri, 'error=');
    if (error <> '') then
    begin
        writeln('OAuth authorization error: ' + error);
        exit;
    end;

    // Check authorization code
    code := ParseParameter(requestUri, 'code=');
    if (code = '') then
    begin
        writeln('Malformed authorization response: ' + requestUri);
        exit;
    end;

    writeln;
    writeln('Authorization code: ' + code);

    responseText := RequestAccessToken(code, szUri);
    writeln(responseText);

    parser := TOAuthResponseParser.Create(nil);
    parser.Load(responseText);

    user := parser.EmailInIdToken;
    accessToken := parser.AccessToken;

    if (accessToken = '') then
    begin
        writeln('Failed to request access token, return!');
        exit;
    end;

    writeln('User: ' + user);
    writeln('AccessToken:' + accessToken);

    RetrieveEmailWithXOAUTH2(user, accessToken);
end;

begin

    CoInitialize(nil);

    writeln('+------------------------------------------------------------------+');
    writeln('  Sign in with MS OAuth');
    writeln('   If you got "This app is not verified" information in Web Browser, ');
    writeln('      click "Advanced" -> Go to ... to continue test.');
    writeln('+------------------------------------------------------------------+');
    writeln('');

    writeln('Press ENTER key to sign in...');
    readln;

    DoOauthAndRetrieveEmail();

    writeln('Press ENTER key to quit...');
    readln;

end.

TLS 1.2 Protocol

TLS is the successor of SSL, more and more SMTP servers require TLS 1.2 encryption now.

If your operating system is Windows XP/Vista/Windows 7/Windows 2003/2008/2008 R2/2012/2012 R2, you need to enable TLS 1.2 protocol in your operating system like this:

Enable TLS 1.2 on Windows XP/Vista/7/10/Windows 2008/2008 R2/2012

Appendix

Comments

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