diff --git a/js/main.js b/js/main.js
index 4e8867c..35f552a 100644
--- a/js/main.js
+++ b/js/main.js
@@ -3,6 +3,7 @@
   if (!root) return;
 
   const username = root.dataset.username;
+  const userEmail = (root.dataset.userEmail || "").trim();
   const serverAddress = root.dataset.serverAddress;
   const apiBase = root.dataset.supportApiBase;
   const supportWsBaseOverride = (root.dataset.supportWsBase || "").trim();
@@ -281,10 +282,14 @@
   };
 
   function clientIdentityHeaders() {
-    return {
+    const headers = {
       "X-F7cloud-User": username,
       "X-F7cloud-Server": serverAddress,
     };
+    if (userEmail) {
+      headers["X-F7cloud-Email"] = userEmail;
+    }
+    return headers;
   }
 
   function revokeAttachmentUrls() {
@@ -1471,12 +1476,16 @@
         showError("Тема и обращение обязательны");
         return;
       }
-      const result = await submitTicketWithRetry({
+      const createPayload = {
         server_address: serverAddress,
         username,
         subject,
         body: TICKET_CREATE_BODY_PLACEHOLDER,
-      });
+      };
+      if (userEmail) {
+        createPayload.client_email = userEmail;
+      }
+      const result = await submitTicketWithRetry(createPayload);
       const ticketNo = result.ticket_number;
       let createdMsg;
       try {
diff --git a/lib/Controller/PageController.php b/lib/Controller/PageController.php
index ff70819..f088a80 100644
--- a/lib/Controller/PageController.php
+++ b/lib/Controller/PageController.php
@@ -72,8 +72,15 @@ class PageController extends Controller {
 		Util::addStyle('f7support', 'f7support');
 		Util::addScript('f7support', 'main');
 
+		$userEmail = '';
+		if ($user !== null) {
+			$mail = $user->getEMailAddress();
+			$userEmail = is_string($mail) ? trim($mail) : '';
+		}
+
 		return new TemplateResponse('f7support', 'main', [
 			'username' => $user ? $user->getUID() : '',
+			'userEmail' => $userEmail,
 			'serverAddress' => $serverHost,
 			'supportApiBase' => $supportApiBase,
 			'supportApiOrigin' => $supportApiOrigin,
diff --git a/templates/main.php b/templates/main.php
index be2a635..cb9f395 100644
--- a/templates/main.php
+++ b/templates/main.php
@@ -2,6 +2,7 @@
 <link rel="preconnect" href="<?php p($_['supportApiOrigin']); ?>" crossorigin>
 <div id="f7support-app"
      data-username="<?php p($_['username']); ?>"
+     data-user-email="<?php p($_['userEmail'] ?? ''); ?>"
      data-server-address="<?php p($_['serverAddress']); ?>"
      data-support-api-base="<?php p($_['supportApiBase']); ?>"
      data-support-ws-base="<?php p($_['supportWsBase'] ?? ''); ?>"