PM Mailing?

In the group administration, where it says Permission to send PM Mailings.
I don't know what PM mailing is. Is it the same as PM? Or what?

Its the same but its sending it to a group.

If you create a PM you can choose who to send it to and if what group.

So even if I don't select it for members, members can still PM single right? Just not bulking the whole group.

You can choose the rights for your members.

ACP=>Users & Groups Tab=>Groups=>Group Administration=>click the modify button by the group you want to use=>Permission to send PM Mailings=>You'll see members/usergroups/mods/admin.

~If you select members,then members can send a message to every group member.

~If you select usergroup,then any member from that usergroup can send a pm to every member in the group at once.

~If you select mods,then any moderator can pm any member in that group can send a pm to every member in that group at once.

~Admins can do it automatically.If you select admins,then you don't want anyone else to send a pm to every member in that group at once.