How to loop something to send in one email in Django

I like to send email to myself that contains the name of users who matches the criteria. My problem is that if I use the for loop in the mass_mail it sends every results in separated emails. So if I have 6 results it sends the email 6 times containing one results in every emails:
(I am using the mass_mail because in the future I like to send emails to more users not just me.)