Assuming that you want to send the same exact email to all recipients, you can use the "multiple emails one for each record in found set" option to send it to all of them in one go.
If you want customize the emails so that each recipient gets a different email, you'd need to set up a loop that loops through the records and sends the email out one email at a time.
Thanks for the quick response,
It will be the same email one thing i would like to do though is i have a radio button on the members layout that says "Recieve Email Alerts" YES/NO - I only want the email to send to members who are set to YES
Hope this makes sense
Just perform a find for all records where that field = "yes" and then email to the found set.