Why won't Sandy email me reminders even though she replies?

Sandy has registered four new events for me via email. I can see them at iwantsandy.com She has also emailed me replies to say that they have been scheduled. However, she isn't emailing me reminders even though the times have passed. Also, clicking on "Email a fresh copy" of my daily digest for today does nothing - no email. Can anyone help?
 
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