Access 2000 email-send ,Outlook security

i would like to send emails to a group of clients in my access database. I am using the sendobject method to do that the problem is that the program always pops a warning that :: A program is trying to send an email on your behalf would you want to alow this.... , usually i send more than 1000 emails. My question is :: Is there a way of disabling this security feature or how can i use the sendkeys method to send the ALT O combination and automate the process e.t.c