diff --git a/Retrieve-emails-from-a-remote-mail-server-(using-builtin-fetchmail).md b/Retrieve-emails-from-a-remote-mail-server-(using-builtin-fetchmail).md
index 4276e98..fa161d0 100644
--- a/Retrieve-emails-from-a-remote-mail-server-(using-builtin-fetchmail).md
+++ b/Retrieve-emails-from-a-remote-mail-server-(using-builtin-fetchmail).md
@@ -41,6 +41,8 @@ poll pop3.example.com proto pop3
 	is 'user2@domain.tld'
 ```
 
+__IMPORTANT__: Don’t forget the last line: e. g. `is 'user1@domain.tld'`. After `is` you have to specify one email address from the configuration file `config/postfix-accounts.cf`. 
+
 More details how to configure fetchmail can be found in the [fetchmail man page in the chapter “The run control file”](http://www.fetchmail.info/fetchmail-man.html#31). 
 
 # Debugging