update

ts/mail/delivery/smtpserver/command-handler.ts

@@ -829,7 +829,16 @@ export class CommandHandler implements ICommandHandler {
         this.sendResponse(socket, '334');
         
         // Wait for credentials
-        credentials = await this.waitForAuthResponse(socket);
+        credentials = await new Promise<string>((resolve, reject) => {
+          const timeout = setTimeout(() => {
+            reject(new Error('Auth response timeout'));
+          }, 30000);
+          
+          socket.once('data', (data: Buffer) => {
+            clearTimeout(timeout);
+            resolve(data.toString().trim());
+          });
+        });
       }
       
       // Decode PLAIN credentials (base64 encoded: authzid\0authcid\0password)
@@ -847,8 +856,7 @@ export class CommandHandler implements ICommandHandler {
       // Authenticate using security handler
       const authenticated = await this.smtpServer.getSecurityHandler().authenticate({
         username,
-        password,
-        mechanism: 'PLAIN'
+        password
       });
       
       if (authenticated) {
@@ -929,8 +937,7 @@ export class CommandHandler implements ICommandHandler {
         // Authenticate using security handler
         const authenticated = await this.smtpServer.getSecurityHandler().authenticate({
           username,
-          password,
-          mechanism: 'LOGIN'
+          password
         });
         
         if (authenticated) {