[Mailman-Users] Automatically reject posts by non-members

[Alias]

Hi guys,

Recently lots of people have started to try spamming my mailing lists - this
is not such a problem as because they're non-members the posts get held for
moderation - however, it's distinctly annoying that I have to keep deleting
them, and also getting mail alerts for them. Could anyone direct me towards
the configuration screen that manages moderation options?

Thanks in advance,
Alias