Update email configuration in README and enhance email handler for Microsoft 365 support

- Updated the README.md to include specific SMTP settings for Microsoft 365 and OAuth2 authentication options.
- Modified the email handler to support OAuth2 authentication for Microsoft 365, improving security and flexibility.
- Enhanced logging to provide clearer feedback on email configuration and authentication methods used.

README.md

@@ -75,12 +75,25 @@ Create a .env file and keep it out of version control. Example:
 
 ```env
 # Email
-SMTP_HOST=
+# For Microsoft 365 / Office 365:
+SMTP_HOST=smtp.office365.com
 SMTP_PORT=587
-SMTP_USER=
+SMTP_USER=your-email@yourdomain.com
-SMTP_PASS=
+SMTP_PASS=your-app-password
-ADMIN_EMAIL=
+# OR use OAuth2 (recommended for Microsoft 365):
-WEBSITE_NAME=365DevNet Support
+# OAUTH2_CLIENT_ID=your-client-id
+# OAUTH2_CLIENT_SECRET=your-client-secret
+# OAUTH2_REFRESH_TOKEN=your-refresh-token
+# OAUTH2_ACCESS_TOKEN=your-access-token (optional)
+
+# For generic SMTP or Mailcow:
+# SMTP_HOST=your-smtp-server
+# SMTP_PORT=587
+# SMTP_USER=your-username
+# SMTP_PASS=your-password
+
+ADMIN_EMAIL=your-email@yourdomain.com
+WEBSITE_NAME=
 
 # Monitoring
 UPTIME_KUMA_URL=

src/env.d.ts

@@ -16,6 +16,10 @@ interface ImportMetaEnv {
   readonly WEBSITE_NAME?: string;
   readonly GEMINI_API_KEY?: string;
   readonly MANUAL_REVIEW_SECRET?: string;
+  readonly OAUTH2_CLIENT_ID?: string;
+  readonly OAUTH2_CLIENT_SECRET?: string;
+  readonly OAUTH2_REFRESH_TOKEN?: string;
+  readonly OAUTH2_ACCESS_TOKEN?: string;
 }
 
 interface ImportMeta {

src/utils/email-handler.ts

@@ -13,16 +13,25 @@ const {
   SMTP_PASS = '',
   ADMIN_EMAIL = '',
   WEBSITE_NAME = '365DevNet Support',
+  // Microsoft 365 / OAuth2 (optional)
+  OAUTH2_CLIENT_ID = '',
+  OAUTH2_CLIENT_SECRET = '',
+  OAUTH2_REFRESH_TOKEN = '',
+  OAUTH2_ACCESS_TOKEN = '',
 } = process.env;
 
 // Email configuration
 const isProduction = process.env.NODE_ENV === 'production';
 
+// Check if using Microsoft 365
+const isMicrosoft365 = SMTP_HOST.includes('office365.com') || SMTP_HOST.includes('outlook.com');
+
 // Debug: Log environment variables on load (only in development or if SMTP_HOST is set)
 if (!isProduction || SMTP_HOST) {
   console.log('[EMAIL CONFIG] SMTP_HOST:', SMTP_HOST || '(not set)');
   console.log('[EMAIL CONFIG] SMTP_PORT:', SMTP_PORT || '(using default: 587)');
   console.log('[EMAIL CONFIG] SMTP_USER:', SMTP_USER ? '***' : '(not set - no auth)');
+  console.log('[EMAIL CONFIG] Provider:', isMicrosoft365 ? 'Microsoft 365' : 'Generic SMTP');
   console.log('[EMAIL CONFIG] ADMIN_EMAIL:', ADMIN_EMAIL || '(not set)');
 }
 
@@ -41,24 +50,54 @@ function initializeTransporter() {
       host: string;
       port: number;
       secure: boolean;
-      tls: { rejectUnauthorized: boolean };
+      tls: { rejectUnauthorized: boolean; ciphers?: string };
-      auth?: { user: string; pass: string };
+      auth?: any; // eslint-disable-line @typescript-eslint/no-explicit-any
     } = {
       host: SMTP_HOST,
       port: port,
       secure: secure,
       tls: {
-        rejectUnauthorized: false, // Accept self-signed certificates (useful for Mailcow)
+        rejectUnauthorized: isMicrosoft365 ? true : false, // Microsoft 365 requires valid certificates
+        // Microsoft 365 specific TLS configuration
+        ...(isMicrosoft365 && {
+          ciphers: 'SSLv3',
+        }),
       },
     };
 
-    // Add authentication if credentials are provided
+    // Microsoft 365 requires authentication - use OAuth2 if available, otherwise basic auth
+    if (isMicrosoft365) {
+      if (OAUTH2_CLIENT_ID && OAUTH2_CLIENT_SECRET && OAUTH2_REFRESH_TOKEN) {
+        // OAuth2 authentication for Microsoft 365
+        transporterConfig.auth = {
+          type: 'OAuth2',
+          user: SMTP_USER || ADMIN_EMAIL,
+          clientId: OAUTH2_CLIENT_ID,
+          clientSecret: OAUTH2_CLIENT_SECRET,
+          refreshToken: OAUTH2_REFRESH_TOKEN,
+          ...(OAUTH2_ACCESS_TOKEN && { accessToken: OAUTH2_ACCESS_TOKEN }),
+        };
+        console.log('[EMAIL CONFIG] Using OAuth2 authentication for Microsoft 365');
+      } else if (SMTP_USER && SMTP_PASS) {
+        // Basic authentication for Microsoft 365 (email + password or app password)
+        transporterConfig.auth = {
+          user: SMTP_USER,
+          pass: SMTP_PASS,
+        };
+        console.log('[EMAIL CONFIG] Using basic authentication for Microsoft 365');
+        console.log('[EMAIL CONFIG] Note: For better security, consider using OAuth2 with app-specific password');
+      } else {
+        console.warn('[EMAIL CONFIG] ⚠️  Microsoft 365 requires authentication but no credentials provided');
+      }
+    } else {
+      // Generic SMTP - add authentication if credentials are provided
       if (SMTP_USER && SMTP_PASS) {
         transporterConfig.auth = {
           user: SMTP_USER,
           pass: SMTP_PASS,
         };
       }
+    }
 
     transporter = nodemailer.createTransport(transporterConfig);
 
@@ -67,12 +106,20 @@ function initializeTransporter() {
         console.error('❌ SMTP connection error:', error.message);
         console.error('   Host:', SMTP_HOST);
         console.error('   Port:', port);
-        console.error('   Auth:', SMTP_USER ? 'Yes' : 'No');
+        console.error('   Provider:', isMicrosoft365 ? 'Microsoft 365' : 'Generic SMTP');
+        console.error('   Auth:', (transporterConfig.auth ? 'Yes' : 'No'));
+        if (isMicrosoft365 && error.message.includes('authentication')) {
+          console.error('   💡 Tip: For Microsoft 365, ensure:');
+          console.error('      - Using your full email address as SMTP_USER');
+          console.error('      - Using an app-specific password (not your regular password)');
+          console.error('      - Or configure OAuth2 with OAUTH2_CLIENT_ID, OAUTH2_CLIENT_SECRET, and OAUTH2_REFRESH_TOKEN');
+        }
       } else {
         console.log('✅ SMTP server is ready to take messages.');
         console.log('   Host:', SMTP_HOST);
         console.log('   Port:', port);
-        console.log('   Auth:', SMTP_USER ? 'Yes' : 'No');
+        console.log('   Provider:', isMicrosoft365 ? 'Microsoft 365' : 'Generic SMTP');
+        console.log('   Auth:', (transporterConfig.auth ? 'Yes' : 'No'));
       }
     });
   } else {