diff --git a/src/server/services/in-app-notification.ts b/src/server/services/in-app-notification.ts
index 7ce271b..43f6434 100644
--- a/src/server/services/in-app-notification.ts
+++ b/src/server/services/in-app-notification.ts
@@ -426,6 +426,10 @@ async function maybeSendEmailWithSetting(
       return
     }
 
+    // Ensure linkUrl is absolute for emails (relative paths break in email clients)
+    const baseUrl = process.env.NEXTAUTH_URL || 'https://portal.monaco-opc.com'
+    const absoluteLinkUrl = linkUrl && linkUrl.startsWith('/') ? `${baseUrl}${linkUrl}` : linkUrl
+
     await sendStyledNotificationEmail(
       user.email,
       user.name || 'User',
@@ -433,7 +437,7 @@ async function maybeSendEmailWithSetting(
       {
         title,
         message,
-        linkUrl,
+        linkUrl: absoluteLinkUrl,
         metadata,
       },
       emailSetting.emailSubject || undefined