'Mail coming from a daemon, ignored'

Hi! I keep asking questions :-) I've created a separate account within the same domain as my list is on with the purpose of sending news items to my list. From that account, however, I cannot post to the list. The address is both in the dist and accept files. The only one who receives mail from that address is the administrator account. The header says: 'Mail coming from a daemon, ignored' Can someone please tell me why? Kind regards, Anne-Marie Oualit