update

ts/mail/delivery/smtpserver/smtp-server.ts

@@ -196,7 +196,19 @@ export class SmtpServer implements ISmtpServer {
       // Start secure server if configured
       if (this.options.securePort && this.tlsHandler.isTlsEnabled()) {
         try {
-          this.secureServer = this.tlsHandler.createSecureServer();
+          // Import the secure server creation utility from our new module
+          // This gives us better certificate handling and error resilience
+          const { createSecureTlsServer } = await import('./secure-server.js');
+          
+          // Create secure server with the certificates
+          // This uses a more robust approach to certificate loading and validation
+          this.secureServer = createSecureTlsServer({
+            key: this.options.key,
+            cert: this.options.cert,
+            ca: this.options.ca
+          });
+          
+          SmtpLogger.info(`Created secure TLS server for port ${this.options.securePort}`);
           
           if (this.secureServer) {
             // Use explicit error handling for secure connections