disallow memebrs to send wide distribution PM

How can I disallow memebrs to send wide distribution PM to groups but allow them only to send to individual memebers ?

Thanks

Hi, in the group administration section of your admin panel there should be an option for this. Click the modify sign ( ) for a group, and you should be taken to the group settings page.

You should then see an option labelled 'Permission to send PM Mailings'. Make sure that members is not checked and then members won't be able to send mass PMs to all the members within that group.

Repeat for all the groups if necessary.