First, check your spam. It is possible that the confirmation email ended up there.
If not, you may have made a typo in your email address. If you are logged in (https://app.relictickets.com/account), you can view your email address under 'Your Profile' and adjust it if necessary. Once you have changed your e-mail address, you will receive all future Relic e-mails there.
Information from the email:
If you missed the confirmation email, don't panic: your ticket will not be sent by email. Here is all the important information from the email:
"Your tickets are securely stored online in your Relic account, which you can open on your mobile phone. It's a good idea to do this before the event to save time and avoid long lines. You can find your tickets at any time on https://app.relictickets.com/account or via our app."
Install the Relic tickets app on your mobile phone:
The easiest way to always have your smart tickets within reach.