How do I restrict postings to list members plus University of Reading addresses?
Go to your “Sender Filters” page of your “Privacy Options” menu and add the following to your “List of non-member addresses whose postings should be automatically accepted” option: ^.*@reading.ac.uk This is a “regular expression” match and tells Mailman to accept any email address which begins with (^) any character (.) followed by zero or more other characters (*) followed by @reading.ac.uk, i.e. all Reading University email addresses. Next, scroll down to your “Action to take for postings from non-members for which no explicit action is defined” option and select “discard”. Remember to apply your settings. Now all non-member postings will be silently discarded and all members whose addresses contain “@reading.ac.uk” (or “@rdg.ac.uk” for that matter) will be automatically accepted. This forces people to use their university addresses rather than external accounts.
