Is there a way to set the email notification preferences for a group of users

the defaults are set..

there is currently no general purpose utility to set something different.

I just wrote a commandline utility for us to disable email for a specific set of users during bulk workitem manipulation. (and restore the users settings later). unfortunately I cannot share it.

the mail config for a user is saved as an xml formatted string in the extended attributes of the user details.
if not modified, the system works on a default setup. (which I saved by using the debugger to get the default value)