Lists can be configured as “closed” lists, which means that only those who are granted explicit permission can send to a list. An “open” list, open to both subscribers and postings, could receive spam if a spammer takes the time to subscribe or is mistakenly added.
Spam is almost always sent to the listname-owner@listsmart.osl.state.or.us address (where “listname” is replaced with the actual name of the list).
You can block specific senders by doing the following:
- Log in to the list’s administration page.
- Under Privacy Options select Sender Filters.
- Scroll to the Non-member Filters section.
- Go to List of non-member addresses whose postings will be automatically rejected.
- Enter the address you would like blocked.
- Click submit.
Refer to the next item in this FAQ to configure your list as “closed.”