Unfortunately, there is no way for us to know which email address has been used to create your Keepsafe account.
For security reasons, in order for us to look up an email address, you would need to send a support message from EACH email address you would like for us to search (please indicate ‘Is this email registered with Keepsafe?’ in the subject line of each of the letters). We will then let you know which one if any is associated to your account.