[globalstrata]

This is probably happening because the email is going to the users SPAM folder and they may not be aware of it. You may want to put a message in that advice the users to check their SPAM folder for the email.

Actually, maybe a good hack would be to be able to tell the user which email address is being used to send the message to them, that way they can add it to their contacts (since many spam software allow email through from people that are in the contact list) and a button to ask for the resubmission of the verify email, so in the case that they missed the email, they can request to get it again.
This will mean that somehow, a secret question will be needed and a way to enter to pending registrations section by entering the email address and secret question, and requesting that resubmission of the email.

Gladys