This is a comment on Mass email, posted by WikiAdmin at 26.02.2018 09:17

View source for Change default settings for allow_intercom and allow_massemail

You can set now at least the default settings  for ##allow_intercom## and ##allow_massemail## via the AdminPanel in the Notifications section.

FIXES: revision:6463209,  revision:f083f6f

existing settings can be reset via SQL query:
UPDATE prefix_user_setting SET allow_intercom = 1;
UPDATE prefix_user_setting SET allow_massemail = 1;

It still needs a solution to set a policy for the different use cases: Opt-In, Opt-Out, Override.