For somereason earlier validation is not ensuring that we have a valid e-email.
In this case, break out of the flow since we don't have a domain that's in our
list and log the user's id so that we can learn more about when this happens.
By a reading of the code flow, it doesn't seem like it should be possible except
with a handful of users that have invalid e-mail addresses in the database but it
seems to be happening pretty regularly.
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