feat(integration): components now play nicer with each other

ts/mail/routing/interfaces.ts

@@ -135,4 +135,68 @@ export interface IEmailContext {
   email: Email;
   /** The SMTP session */
   session: IExtendedSmtpSession;
+}
+
+/**
+ * Email domain configuration
+ */
+export interface IEmailDomainConfig {
+  /** Domain name */
+  domain: string;
+  
+  /** DNS handling mode */
+  dnsMode: 'forward' | 'internal-dns' | 'external-dns';
+  
+  /** DNS configuration based on mode */
+  dns?: {
+    /** For 'forward' mode */
+    forward?: {
+      /** Skip DNS validation (default: false) */
+      skipDnsValidation?: boolean;
+      /** Target server's expected domain */
+      targetDomain?: string;
+    };
+    
+    /** For 'internal-dns' mode */
+    internal?: {
+      /** TTL for DNS records in seconds (default: 3600) */
+      ttl?: number;
+      /** MX record priority (default: 10) */
+      mxPriority?: number;
+    };
+    
+    /** For 'external-dns' mode */
+    external?: {
+      /** Custom DNS servers (default: system DNS) */
+      servers?: string[];
+      /** Which records to validate (default: ['MX', 'SPF', 'DKIM', 'DMARC']) */
+      requiredRecords?: ('MX' | 'SPF' | 'DKIM' | 'DMARC')[];
+    };
+  };
+  
+  /** Per-domain DKIM settings (DKIM always enabled) */
+  dkim?: {
+    /** DKIM selector (default: 'default') */
+    selector?: string;
+    /** Key size in bits (default: 2048) */
+    keySize?: number;
+    /** Automatically rotate keys (default: false) */
+    rotateKeys?: boolean;
+    /** Days between key rotations (default: 90) */
+    rotationInterval?: number;
+  };
+  
+  /** Per-domain rate limits */
+  rateLimits?: {
+    outbound?: {
+      messagesPerMinute?: number;
+      messagesPerHour?: number;
+      messagesPerDay?: number;
+    };
+    inbound?: {
+      messagesPerMinute?: number;
+      connectionsPerIp?: number;
+      recipientsPerMessage?: number;
+    };
+  };
 }