Do unlicensed users send out mention email notifications?

I have invited co workers to use a smartsheet. I have the smartsheet license but they don't. When I mention them and they mention me, the email notifications come through.

When they mention each other, they don't receive an email. Does this have something to do with the licensing? Do unlicensed users have the capability of sending out emails via mention to other unlicensed users?

Answers