Mass delete spam/fake users

Hi all,

I just converted my old vBulletin board to IPB4. I'm very happy of it.

I see now that under the members I have a lot o fake/spam users. Is there a way to make a multiple selection and then delete them? Actually I found that the unique way to do that is manually delete/flag a spam.

I need to get these fakes off because I can't send newsletter with the database full of fake addresses.

Thank you all.