I have a dedicated server running a postfix script.
I can send and receive email using Eudora but when I try to run a script on a site on the server to handle enquiries I get messages such as;
ERROR 3: authentication failure [SMTP: Invalid response code received from server (code: 535, response: 5.7.8 Error: authentication failed: generic failure)] ERROR: 502 5.5.2 Error: command not recognized
and a variety of other messages depending on what I alter in /postfix/[url removed, login to view]
I need someone who knows their way around postfix to sort it out so the script will pass on enquiries and still keep the mail server secure.