Can users @mention private chatter groups, that they are not a member of? The idea is to restrict members of a group (which is why I prefer private group), but non-member users be able to @mention the group.
And can I use @mention on email addresses? Can I use @mention on a public group?
Edit 1: This is for a support team containing 20+ users. Currently we're mentioning all users, but some get missed at times. The team works in shifts, so mentioning only a few doesn't seem to work, hence thinking of Chatter Groups.