diff --git a/README.md b/README.md
index 0420c13..3af32cd 100644
--- a/README.md
+++ b/README.md
@@ -107,7 +107,7 @@ Run the script. Make sure you're root and inside the `script` folder
 ./bullmail.sh
 ```
 
-Wait for it to complete. Trust the plan.
+Wait for it to complete. Trust the plan. When postfix asks questions, pick "Internet site" and when it asks for a domain enter `yourdomain.com` (obviously, replace yourdomain.com with your own domain. Don't add `mail.` in front of it)
 
 ## Step 9
 The script should output something like this at the end: