Update helpers_cache.json

json/helpers_cache.json

@@ -3346,6 +3346,20 @@
       "password": "admin"
     }
   },
+  {
+    "name": "Open-Archiver",
+    "slug": "open-archiver",
+    "desc": "Open Archiver is a secure, self-hosted email archiving solution, and it's completely open source. Get an email archiver that enables full-text search across email and attachments. Create a permanent, searchable, and compliant mail archive from Google Workspace, Microsoft 35, and any IMAP server.",
+    "script": "ct/open-archiver.sh",
+    "script_url": "https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/ct/open-archiver.sh",
+    "categories": [
+      7
+    ],
+    "notes": [
+      "Data directory is: `/opt/openarchiver-data`. If you have a lot of email, you might consider mounting external storage to this directory."
+    ],
+    "type": "ct"
+  },
   {
     "name": "Opengist",
     "slug": "opengist",