Turn off Mass Contact confirmation email to admin

Hi. I use Drupal 5.13 (?) - my site is http://www.thewomensnest.com

Every time I send out a Mass Contact, I receive an email confirmation - the issue is that I can only send 49 at a time and I have 1700+ members, so my Inbox is stuffed w/confirmations. I can't figure out how to turn off the confirmation - I've looked in the Configure Permissions area of Mass Contact - any ideas?

Thank you!!
Melissa
The Women's Nest
http://www.thewomensnest.com