Are you a BES Admin?
What mail platform and BES version are you using?
If you put in a different email address into the Enterprise Activation field do you receive that activation email quickly? (This is actually a good test to see if you're on a proper data plan ... I do the test with my gmail account)
Do you have spam filters in place on your mail system?
Does anyone else have this problem?
What carrier are you with?

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