I propose to implement a new specialpage option accessible for Sysops or
Developers only to send an mail in exceptional cases (emergencies and so on) to
all users, who have set up an email address in their preferences.
The option is already listed on the to-do sub-page to
http://meta.wikipedia.org/Enotif =
http://meta.wikimedia.org/wiki/Email_notification_to-do_list#broadcast_email_function
Mainly suited for small- to medium-sized wikis.
Version: unspecified
Severity: enhancement