diff --git a/frontend/src/lib/xray/inbound-defaults.ts b/frontend/src/lib/xray/inbound-defaults.ts
index 1c8e2aa5..2f45b3c1 100644
--- a/frontend/src/lib/xray/inbound-defaults.ts
+++ b/frontend/src/lib/xray/inbound-defaults.ts
@@ -46,7 +46,7 @@ interface ClientBase {
 
 function clientBase(seed: ClientBaseSeed = {}): ClientBase {
   return {
-    email: seed.email ?? RandomUtil.randomLowerAndNum(8),
+    email: seed.email ?? RandomUtil.randomLowerAndNum(10),
     limitIp: seed.limitIp ?? 0,
     totalGB: seed.totalGB ?? 0,
     expiryTime: seed.expiryTime ?? 0,
diff --git a/frontend/src/pages/clients/ClientBulkAddModal.tsx b/frontend/src/pages/clients/ClientBulkAddModal.tsx
index 76f27187..9b4d8c42 100644
--- a/frontend/src/pages/clients/ClientBulkAddModal.tsx
+++ b/frontend/src/pages/clients/ClientBulkAddModal.tsx
@@ -130,7 +130,7 @@ export default function ClientBulkAddModal({
     const postfix = method > 2 && form.emailPostfix.length > 0 ? form.emailPostfix : '';
     for (let i = start; i < end; i++) {
       let email = '';
-      if (method !== 4) email = RandomUtil.randomLowerAndNum(6);
+      if (method !== 4) email = RandomUtil.randomLowerAndNum(10);
       email += useNum ? prefix + String(i) + postfix : prefix + postfix;
       out.push(email);
     }
diff --git a/frontend/src/pages/clients/ClientFormModal.tsx b/frontend/src/pages/clients/ClientFormModal.tsx
index 190048f5..873e749f 100644
--- a/frontend/src/pages/clients/ClientFormModal.tsx
+++ b/frontend/src/pages/clients/ClientFormModal.tsx
@@ -191,7 +191,7 @@ export default function ClientFormModal({
     } else {
       setForm({
         ...emptyForm(),
-        email: RandomUtil.randomLowerAndNum(9),
+        email: RandomUtil.randomLowerAndNum(10),
         uuid: RandomUtil.randomUUID(),
         subId: RandomUtil.randomLowerAndNum(16),
         password: RandomUtil.randomLowerAndNum(16),