I like to send emails to selected users from the userlist. I have a couple of cb fields and like to make a (database) select, so I can send a mailing to all users, with a content in one or two of these fields.

I use CB for registration for a couple of sportevents and like to send confirmation mails only to the users, they have registered for the event xy. So I have to send 6 seperate mailings, one for each event and I don't want to send a confirmation to users which are not registerd for a event.

Is there any plugin I can use?