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ts/mail/routing/classes.email.config.ts

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+import type { EmailProcessingMode } from '../delivery/interfaces.ts';
+
+// Re-export EmailProcessingMode type
+export type { EmailProcessingMode };
+
+
+/**
+ * Domain rule interface for pattern-based routing
+ */
+export interface IDomainRule {
+  // Domain pattern (e.g., "*@example.com", "*@*.example.net")
+  pattern: string;
+  
+  // Handling mode for this pattern
+  mode: EmailProcessingMode;
+  
+  // Forward mode configuration
+  target?: {
+    server: string;
+    port?: number;
+    useTls?: boolean;
+    authentication?: {
+      user?: string;
+      pass?: string;
+    };
+  };
+  
+  // MTA mode configuration
+  mtaOptions?: IMtaOptions;
+  
+  // Process mode configuration
+  contentScanning?: boolean;
+  scanners?: IContentScanner[];
+  transformations?: ITransformation[];
+  
+  // Rate limits for this domain
+  rateLimits?: {
+    maxMessagesPerMinute?: number;
+    maxRecipientsPerMessage?: number;
+  };
+}
+
+/**
+ * MTA options interface
+ */
+export interface IMtaOptions {
+  domain?: string;
+  allowLocalDelivery?: boolean;
+  localDeliveryPath?: string;
+  dkimSign?: boolean;
+  dkimOptions?: {
+    domainName: string;
+    keySelector: string;
+    privateKey?: string;
+  };
+  smtpBanner?: string;
+  maxConnections?: number;
+  connTimeout?: number;
+  spoolDir?: string;
+}
+
+/**
+ * Content scanner interface
+ */
+export interface IContentScanner {
+  type: 'spam' | 'virus' | 'attachment';
+  threshold?: number;
+  action: 'tag' | 'reject';
+  blockedExtensions?: string[];
+}
+
+/**
+ * Transformation interface
+ */
+export interface ITransformation {
+  type: string;
+  header?: string;
+  value?: string;
+  domains?: string[];
+  append?: boolean;
+  [key: string]: any;
+}