There could be any number of reasons some eligible customers may not have received an e-mail. It is also possible that you were not an affected taxpayer. In this public forum, we cannot collect the information necessary to determine if you should have received one.
I would advise you to check your bank account for the next week as the IRS will continue to process payments through January 15, 2021.
You may also wish to keep an eye on these links for any updates as things are changing rapidly in many cases.