Implemented `isLocalDomain` function to check if the domain of a recipient is that of this mail server

source/client/client.d

@@ -574,7 +574,7 @@ public final class ButterflyClient : Thread
             * Check if the domain of this recipient is this server
             * or if it is a remote server.
             */
-            if(cmp(domain, server.domain) == 0)
+            if(server.isLocalDomain(domain))
             {
                 writeln("Local delivery occurring...");
 

source/server/server.d

@@ -5,6 +5,7 @@ import client.client : ButterflyClient;
 import std.file : mkdir, exists, isDir;
 import server.listener : ButterflyListener;
 import std.stdio : writeln;
+import std.string : cmp;
 
 public final class ButterflyServer
 {
@@ -24,9 +25,6 @@ public final class ButterflyServer
     */
     private bool active = true;
 
-    /* TODO: Server domain */
-    public string domain;
-
     this(ButterflyListener[] listeners)
     {
         /**
@@ -39,9 +37,6 @@ public final class ButterflyServer
         */
         this.listeners = listeners;
 
-        /* Set the domain of the server */
-        this.domain = domain;
-
         /* Start accepting connections */
         run();
     }
@@ -101,4 +96,21 @@ public final class ButterflyServer
         }
     }
 
+    public bool isLocalDomain(string domain)
+    {
+        /**
+        * Loop through each listener and check if the requested domain
+        * appears in one of them.
+        */ 
+        foreach(ButterflyListener listener; listeners)
+        {
+            if(cmp(listener.getDomain(), domain) == 0)
+            {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
 }