We would like quick control to set email notifications on users, without requiring the users to do it themselves.

Originally this started as a request to email general groups(svn-list@domain.com), but it sounds like it's easier to allow admin control.

See https://answers.atlassian.com/questions/83873/is-there-a-way-to-use-fisheye-to-send-an-e-mail-to-a-group-list for reference.