javamail outlook mfa验证

在JavaMail中使用Outlook的MFA验证需要使用Microsoft Graph API进行身份验证。您需要在Microsoft Azure门户中创建一个应用程序并授权该应用程序访问Outlook邮件。然后，您需要使用Java程序获取访问令牌并在JavaMail中使用该令牌进行身份验证。

以下是一个使用Outlook的JavaMail MFA验证示例：

import java.net.URI;
import java.util.Collections;
import java.util.Properties;
import javax.mail.*;
import javax.mail.internet.*;

import com.microsoft.aad.msal4j.*;
import com.microsoft.graph.authentication.IAuthenticationProvider;
import com.microsoft.graph.http.IHttpRequest;
import com.microsoft.graph.models.extensions.IGraphServiceClient;
import com.microsoft.graph.requests.extensions.GraphServiceClient;

public class JavaMailOutlookMFAExample {
    public static void main(String[] args) throws Exception {
        String clientId = "your_client_id";
        String clientSecret = "your_client_secret";
        String tenantId = "your_tenant_id";
        String username = "your_email_address";
        String mfaToken = "your_mfa_token"; // MFA token generated by your authenticator app

        // Initialize MSAL4J ConfidentialClientApplication
        IConfidentialClientApplication app = ConfidentialClientApplication.builder(clientId, ClientCredentialFactory.createFromSecret(clientSecret))
            .authority("https://login.microsoftonline.com/" + tenantId)
            .build();

        // Acquire an access token for the Microsoft Graph API
        String[] scopes = { "https://graph.microsoft.com/.default" };
        IAuthenticationResult result = app.acquireToken(ClientCredentialParameters.builder(Collections.singleton(scopes)).build()).get();
        String accessToken = result.accessToken();

        // Create an IAuthenticationProvider for Microsoft Graph API
        IAuthenticationProvider authProvider = new IAuthenticationProvider() {
            @Override
            public void authenticateRequest(IHttpRequest request) {
                request.addHeader("Authorization", "Bearer " + accessToken);
            }
        };

        // Create an IGraphServiceClient for Microsoft Graph API
        IGraphServiceClient graphClient = GraphServiceClient.builder().authenticationProvider(authProvider).buildClient();

        // Use Microsoft Graph API to get the user's email address
        String userEmailAddress = graphClient.me().get().mail().toString();

        // Set JavaMail properties for Outlook
        Properties props = new Properties();
        props.put("mail.store.protocol", "https");
        props.put("mail.smtp.host", "smtp.office365.com");
        props.put("mail.smtp.port", "587");
        props.put("mail.smtp.auth", "true");

        // Create a JavaMail Session
        Session session = Session.getDefaultInstance(props);

        // Enable debugging output
        session.setDebug(true);

        // Create a JavaMail Store for Outlook
        Store store = session.getStore("https");
        store.connect("outlook.office365.com", userEmailAddress, accessToken + mfaToken);

        // Create a JavaMail Folder for the Inbox
        Folder inbox = store.getFolder("Inbox");
        inbox.open(Folder.READ_ONLY);

        // Print the number of messages in the Inbox
        System.out.println("Number of messages in Inbox: " + inbox.getMessageCount());

        // Close the JavaMail Folder and Store
        inbox.close(false);
        store.close();

        System.out.println("Done.");
    }
}

在此示例中，您需要使用您的Azure应用程序的客户端ID、客户端密钥和租户ID替换示例代码中的`clientId`、`clientSecret`和`tenantId`变量。在运行示例程序之前，您需要先使用MSAL4J库获取访问令牌，然后使用该令牌进行Outlook身份验证。此外，您需要在JavaMail的配置中设置`mail.store.protocol`属性为`https`，并将`mail.smtp.host`和`mail.smtp.port`属性设置为`smtp.office365.com`和`587`。

请注意，Outlook的MFA验证可能需要不同的配置参数。因此，建议您查阅Microsoft Graph API文档以了解如何在JavaMail中使用Outlook的MFA验证。