diff --git a/public/v2/apps/poste-io.json b/public/v2/apps/poste-io.json
index 2be0d90..8ab40bf 100644
--- a/public/v2/apps/poste-io.json
+++ b/public/v2/apps/poste-io.json
@@ -34,7 +34,7 @@
   },
   "instructions": {
     "start": "SMTP + IMAP + POP3 + Antispam + Antivirus\nWeb administration + Web email\n...on your server in ~5 minutes\n\nRecommended: Use\"mail\" as the App Name.",
-    "end": "Poste is deployed and available as $$cap_appname. \n\n IMPORTANT: It will take up to 2 minutes for Poste to be ready. Before that, you might see 502 error page.\nThe trick to not getting marked as spam is to properly set up the reverse DNS for your server, DKIM, and SPF records."
+    "end": "Please paste the preDeployFunction from https://github.com/caprover/caprover/issues/479#issuecomment-520902309 to the App Config > Pre-Deploy section of your created poste.io instance $$cap_appname.\n\nAlso ensure that you've set up the reverse DNS (PTR record) for your server and DKIM, SPF (DNS TXT) records.\n\nThe deployment can take up to 2 minutes."
   },
   "variables": [
     {