diff --git a/app/[lang]/dashboard/users/page.tsx b/app/[lang]/dashboard/users/page.tsx
index 48a3988..2bd0c3e 100644
--- a/app/[lang]/dashboard/users/page.tsx
+++ b/app/[lang]/dashboard/users/page.tsx
@@ -1,6 +1,7 @@
 "use client";
 
 import { useState, useEffect } from "react";
+import { useSession } from "next-auth/react";
 import { useDictionary } from "@/components/DictionaryContext";
 
 interface User {
@@ -19,6 +20,7 @@ export default function UsersPage() {
   const [search, setSearch] = useState("");
   const [isModalOpen, setIsModalOpen] = useState(false);
   const [editingUser, setEditingUser] = useState<User | null>(null);
+  const { data: session } = useSession();
 
   // Form state
   const [formData, setFormData] = useState({
@@ -242,22 +244,36 @@ export default function UsersPage() {
                 <input className="input" type="password" value={formData.password} onChange={e => setFormData({...formData, password: e.target.value})} required={!editingUser} />
               </div>
               <div style={{ display: "grid", gridTemplateColumns: "1fr 1fr", gap: 14 }}>
-                <div>
-                  <label className="label">Rol</label>
-                  <select className="input" value={formData.role} onChange={e => setFormData({...formData, role: e.target.value})}>
-                    <option value="SUPER_ADMIN">Süper Admin</option>
-                    <option value="DOMAIN_ADMIN">Domain Admin</option>
-                  </select>
-                </div>
+                {session?.user?.role === "SUPER_ADMIN" ? (
+                  <div>
+                    <label className="label">Rol</label>
+                    <select className="input" value={formData.role} onChange={e => setFormData({...formData, role: e.target.value})}>
+                      <option value="SUPER_ADMIN">Süper Admin</option>
+                      <option value="DOMAIN_ADMIN">Domain Admin</option>
+                    </select>
+                  </div>
+                ) : (
+                  <div>
+                    <label className="label">Rol</label>
+                    <input className="input" value="Domain Admin" disabled />
+                  </div>
+                )}
                 <div>
                   <label className="label">Telegram ID</label>
                   <input className="input" placeholder="Örn: 5009005027" value={formData.telegramId} onChange={e => setFormData({...formData, telegramId: e.target.value})} />
                 </div>
               </div>
-              <div>
-                <label className="label">İzinli Domainler (Virgülle ayırın, tümü için *)</label>
-                <input className="input" placeholder="domain1.com, domain2.com" value={formData.domains} onChange={e => setFormData({...formData, domains: e.target.value})} />
-              </div>
+              {session?.user?.role === "SUPER_ADMIN" ? (
+                <div>
+                  <label className="label">İzinli Domainler (Virgülle ayırın, tümü için *)</label>
+                  <input className="input" placeholder="domain1.com, domain2.com" value={formData.domains} onChange={e => setFormData({...formData, domains: e.target.value})} />
+                </div>
+              ) : (
+                <div>
+                  <label className="label">İzinli Domainler</label>
+                  <input className="input" value={session?.user?.domains?.join(", ")} disabled />
+                </div>
+              )}
               <div style={{ display: "flex", gap: 10, marginTop: 10 }}>
                 <button type="button" className="btn btn-ghost" style={{ flex: 1 }} onClick={() => setIsModalOpen(false)}>İptal</button>
                 <button type="submit" className="btn btn-primary" style={{ flex: 1 }} disabled={saving}>
diff --git a/app/api/users/[id]/route.ts b/app/api/users/[id]/route.ts
index a5ebfc8..a9be352 100644
--- a/app/api/users/[id]/route.ts
+++ b/app/api/users/[id]/route.ts
@@ -7,22 +7,44 @@ export async function PATCH(req: NextRequest, { params }: { params: Promise<{ id
   const session = await auth();
   const { id } = await params;
 
-  if (!session || session.user.role !== "SUPER_ADMIN") {
-    return NextResponse.json({ error: "Forbidden" }, { status: 403 });
+  if (!session) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
   }
 
+  const userRole = session.user.role;
+  const adminDomains = session.user.domains || [];
+
   try {
+    // Mevcut kullanıcıyı kontrol et
+    const existingUser = await prisma.user.findUnique({ where: { id } });
+    if (!existingUser) return NextResponse.json({ error: "User not found" }, { status: 404 });
+
+    // Güvenlik Kontrolü: Domain admin sadece kendi domainindeki kullanıcıyı güncelleyebilir
+    if (userRole !== "SUPER_ADMIN") {
+      const hasAccess = existingUser.domains.some(d => adminDomains.includes(d));
+      if (!hasAccess) return NextResponse.json({ error: "Forbidden" }, { status: 403 });
+    }
+
     const body = await req.json();
     const { name, email, password, role, domains, telegramId } = body;
 
+    let finalDomains = domains;
+    let finalRole = role;
+
+    // Güvenlik: Domain admin yetki yükseltemez veya domain değiştiremez
+    if (userRole !== "SUPER_ADMIN") {
+      finalDomains = adminDomains; // Kendi domainlerine kilitler
+      finalRole = "DOMAIN_ADMIN";
+    }
+
     const user = await prisma.user.update({
       where: { id },
       data: {
         name,
         email: email?.toLowerCase(),
         password,
-        role,
-        domains,
+        role: finalRole,
+        domains: finalDomains,
         telegramId,
       },
     });
@@ -38,11 +60,23 @@ export async function DELETE(req: NextRequest, { params }: { params: Promise<{ i
   const session = await auth();
   const { id } = await params;
 
-  if (!session || session.user.role !== "SUPER_ADMIN") {
-    return NextResponse.json({ error: "Forbidden" }, { status: 403 });
+  if (!session) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
   }
 
+  const userRole = session.user.role;
+  const adminDomains = session.user.domains || [];
+
   try {
+    const existingUser = await prisma.user.findUnique({ where: { id } });
+    if (!existingUser) return NextResponse.json({ error: "User not found" }, { status: 404 });
+
+    // Güvenlik Kontrolü
+    if (userRole !== "SUPER_ADMIN") {
+      const hasAccess = existingUser.domains.some(d => adminDomains.includes(d));
+      if (!hasAccess) return NextResponse.json({ error: "Forbidden" }, { status: 403 });
+    }
+
     await prisma.user.delete({
       where: { id },
     });
diff --git a/app/api/users/route.ts b/app/api/users/route.ts
index a8df5e4..0daf6c3 100644
--- a/app/api/users/route.ts
+++ b/app/api/users/route.ts
@@ -5,13 +5,30 @@ import { prisma } from "@/lib/prisma";
 // GET /api/users — list all users
 export async function GET() {
   const session = await auth();
-  if (!session || session.user.role !== "SUPER_ADMIN") {
-    return NextResponse.json({ error: "Forbidden" }, { status: 403 });
+  if (!session) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
   }
 
-  const users = await prisma.user.findMany({
-    orderBy: { createdAt: "asc" },
-  });
+  const userRole = session.user.role;
+  const userDomains = session.user.domains || [];
+
+  let users;
+  if (userRole === "SUPER_ADMIN") {
+    // Super admin her şeyi görür
+    users = await prisma.user.findMany({
+      orderBy: { createdAt: "asc" },
+    });
+  } else {
+    // Domain admin sadece kendi domainlerine dokunan kullanıcıları görür
+    users = await prisma.user.findMany({
+      where: {
+        domains: {
+          hasSome: userDomains
+        }
+      },
+      orderBy: { createdAt: "asc" },
+    });
+  }
 
   return NextResponse.json(users);
 }
@@ -19,21 +36,34 @@ export async function GET() {
 // POST /api/users — create a new user
 export async function POST(req: NextRequest) {
   const session = await auth();
-  if (!session || session.user.role !== "SUPER_ADMIN") {
-    return NextResponse.json({ error: "Forbidden" }, { status: 403 });
+  if (!session) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
   }
 
+  const userRole = session.user.role;
+  const adminDomains = session.user.domains || [];
+
   try {
     const body = await req.json();
     const { name, email, password, role, domains, telegramId } = body;
 
+    let finalDomains = domains || [];
+    let finalRole = role || "DOMAIN_ADMIN";
+
+    // Güvenlik: Domain admin yetkisini aşamaz
+    if (userRole !== "SUPER_ADMIN") {
+      // Eğer domain admin ise, yeni kullanıcıya sadece kendi domainlerini verebilir
+      finalDomains = adminDomains;
+      finalRole = "DOMAIN_ADMIN"; // Başka bir super admin oluşturamaz
+    }
+
     const user = await prisma.user.create({
       data: {
         name,
         email: email.toLowerCase(),
         password,
-        role: role || "DOMAIN_ADMIN",
-        domains: domains || [],
+        role: finalRole,
+        domains: finalDomains,
         telegramId,
       },
     });
diff --git a/components/Sidebar.tsx b/components/Sidebar.tsx
index d520c83..e875d6f 100644
--- a/components/Sidebar.tsx
+++ b/components/Sidebar.tsx
@@ -24,8 +24,8 @@ export default function Sidebar({ dict, lang }: { dict: any; lang: string }) {
       section: dict.sidebar?.management || "YÖNETİM",
       items: [
         { href: `/${lang}/dashboard/domains`, label: dict.domains?.title || "Domainler", icon: GlobeIcon, roles: ["SUPER_ADMIN"] },
-        { href: `/${lang}/dashboard/users`, label: dict.sidebar?.users || "Kullanıcılar", icon: UsersIcon, roles: ["SUPER_ADMIN"] },
-        { href: `/${lang}/dashboard/mappings`, label: dict.sidebar?.mappings || "Eşleştirmeler", icon: LinkIcon, roles: ["SUPER_ADMIN"] },
+        { href: `/${lang}/dashboard/users`, label: dict.sidebar?.users || "Kullanıcılar", icon: UsersIcon, roles: ["SUPER_ADMIN", "DOMAIN_ADMIN"] },
+        { href: `/${lang}/dashboard/mappings`, label: dict.sidebar?.mappings || "Eşleştirmeler", icon: LinkIcon, roles: ["SUPER_ADMIN", "DOMAIN_ADMIN"] },
         { href: `/${lang}/dashboard/mailboxes`, label: dict.sidebar?.mailboxes || "Mail Hesapları", icon: MailIcon, roles: ["SUPER_ADMIN", "DOMAIN_ADMIN"] },
         { href: `/${lang}/dashboard/logs`, label: dict.sidebar?.logs || "Loglar", icon: ListIcon, roles: ["SUPER_ADMIN"] },
       ],