Resend confirmation

We have never been able to get the "Resend confirmation" function in Community Builder User Management to work. Every time we have a user that is not confirmed and we select them and then click the Resend confirmation button, it shows that 1 message was sent, but the email is never sent or received. We have tested this with our own test users and they never receive a resent email, even though the message at the top of the screen says "Sent confirmation emails to 1 users".

All other Community Builder/CBSubs mails are being sent, so we know that the mail function on our site is working.

Is there some setting we need to look at to find the cause of this?

Seams to be working fine in my tests. The only requirement is that they aren't confirmed. If they are confirmed already it won't send the reconfirmation email. Is the pending email subject and message configured in CB > Configuration > Registration? Do confirmation emails send fine during normal frontend registration?