[Koha] Where can we find e-mail notices ready to be sent

Hi everybody, I have properly set the circulation rules, the item circulation alerts, defined e-mail notices and set notice/status triggers for overdue items. But now I have a doubt: where can I find the list of all notices (specially overdue notices, but also renewals, holds ready to be picked up, etc) that are ready to be sent to our users? I know some users have overdues, but I don't know where to look for the notices. Can anyone help me, please? Many thanks, Vanda