update

ts/mail/delivery/smtpserver/interfaces.ts

@@ -93,6 +93,11 @@ export interface ISmtpSession {
    */
   emailDataChunks?: string[];
   
+  /**
+   * Total size of email data chunks (tracked incrementally for performance)
+   */
+  emailDataSize?: number;
+  
   /**
    * Whether the connection is using TLS
    */
@@ -439,10 +444,15 @@ export interface ICommandHandler {
  */
 export interface IDataHandler {
   /**
-   * Process incoming email data
+   * Process incoming email data (legacy line-based)
    */
   processEmailData(socket: plugins.net.Socket | plugins.tls.TLSSocket, data: string): Promise<void>;
   
+  /**
+   * Handle raw data chunks during DATA mode (optimized for large messages)
+   */
+  handleDataReceived(socket: plugins.net.Socket | plugins.tls.TLSSocket, data: string): Promise<void>;
+  
   /**
    * Process a complete email
    */