THE PRODUCT SENDS NO ADVERTISING AND NO NEWSLETTERS. A marketing email is possible only with a person's separate consent, and the product asks nobody for such consent right now - which means there are no such emails.
Every email is a service one and comes in answer to an action: the code at sign-up, the link to confirm an address, the access recovery code, a notice about a changed password or address, a message about a new way of signing in, a confirmation of a support request.
The email address is not sold and is not passed on for advertising. It is needed to recognise a person at sign-in, to return access to the account and to send those very service messages.
The emails are sent by a third-party mail service - it handles the address on our instruction and only for delivery.
The product may write on an important account security matter even if the person asked for nothing: for example, when a new way of signing in was tied to the account. Such emails cannot be turned off, they protect access.
If an email has not arrived - look in the spam folder first: codes and links often settle there.