Password Required

This option determines whether lists postings contributed by email require the sender to put their personal password in the message body.

If certain members do not have passwords, this option will not have any affect on their ability to post messages to the list. Passwords will not be required of them for their mail to be distributed to the list. Passwords will only be required for members who have passwords.

If you want all members to have passwords, and for their passwords to be required in all list postings, you should also set "Require Password" to be true. "Require Password" (as distinct from "Password Required") requires that all members have passwords. The "Password Required" setting is found in the "Security for Subscribers" section of the List Configuration settings.