This defines how secure the list is to new subscriptions. The possible choices are:

• Open: This allows anyone who finds this mailing list can join, either by email or by using the web interface. After joining (and possibly confirming the membership), this person is going to have full member status.
• Private: This prevents anyone from joining the mailing list immediately. When they attempt to join, (either by email or using the web interface) a list administrator has to approve their request to join before the person becomes a member. List administrators who have their settings defined to receive Admin Mail are going to receive an email notice when a person requests to join a private mailing list.
  When the list admin receives a request to join a private list and the request was done by email, the notification email message that Aurea List Manager sends out also includes the original requestor's email message, which can be helpful determining if the person should be allowed onto the list.

• Password: This is a protected mailing list which allows anyone who finds this mailing list can join (either by email or using the Aurea List Manager web interface) and is automatically approved only if they know the password. If they do not know the password, they are automatically rejected. The password is defined in a field further down this page. For subscription requests that arrive via email, the password is entered at the end of the subscription request, as in:
  subscribe jazz-discuss open-sesame
• Closed: This mailing list is one in which non-members are not able to apply for membership. If a request for membership arrives by email, it is automatically denied. On the Aurea List Manager web interface, the Subscribe button is not going to be a choice. New members to a closed mailing list must be added by the list administrator.
  

If the list Security (above) is set to Password, this field defines the password required for new members to join the mailing list.

This setting determines whether subscription requests by email are accepted. By default, members can join a mailing list using the Aurea List Manager web interface or by sending a subscribe email command to Aurea List Manager.

If you want to require people to join using the Aurea List Manager web interface, you can change this setting so those requests to join by email are rejected.