If you're not receiving Boom! emails, check your spam or junk folder, as well as your email's social and promotional tabs. Email providers sometimes filter messages from new sources into these folders.
Ensure that your provider isn't blocking emails from txn.mail.rewardgateway.net. If you're using a work email, this may require assistance from your IT team.
Also, allow some time for the email to arrive before requesting it again, as delivery may occasionally be delayed due to your provider’s security settings.