Hello @summer,

Thanks for sharing this with the Community.

When you check, can you confirm the following steps:
1.) Check your Junk/Spam folder
2.) Please search for the words, "Confirm your Klaviyo email"
3.) Check any filter or firewall settings as it may have been filtered.
4.) Add support@klaviyo.com to your contacts and please retry to send the message.
5.) Check the Promotions Tab if this is in Gmail​​​​​​

If none of the above resolves the issue, use another email address for verification and run through the steps again with that email address if necessary. Once you have that email verified, you can add the original email to the account by following the steps here and also remove the other email address if you wish.