Medium--
If you are sending emails by automating Outlook from Access with VBA you can
use Dmitry Streblechenko's "Outlook Redemption" dll to circumvent the
security: http://www.dimastr.com/redemption/
Hard--
You can also build your own "Click Yes" style routine using VB which will do
the same thing as the Click Yes program, but from within Access. Here is a
link for some ideas on how that might be achieved, though you will have to
figure out some kind of timer system--maybe the Windows API timer: http://www.freevbcode.com/ShowCode.asp?ID=6654
Why not just uncheck the "warn me about other applications trying to send
emails" from your email program? I have Outlook express and I send emails
from Access 97 all the time.