XF 2.0 Bulk confirm / email users awaiting confirmation email

Hello there, From a very green admin. I went to send out an email this morning to all users and only 10,000+ emails went out as compared to the 12000+ users I have. I have a feeling the delta is users that may not have received a confirmation email at some point when I used to require a conformation email when registering.The server may have been down or went to spam etc.. Anyways what I am trying to do is confirm all of those users and then send out an email to those users only letting them know that their account is now approved. How do I view the list of unconfirmed users to make sure they arent spam, then approve the ones that are valid, and then send them an email. I am sorry if this is elementary and I appreciate the advice in advance. I hope everyone stays safe.