People who use nopcommerce v4.6 and Postgresql, emails are case sensitive at login page. However at the Customer table, "Email" column defined as "Citiext" data type which allows us to avoid case sensitivity issues. For example, we have a registered user with test@gmail.com. Select * from "Customer" where "Email" = 'Test@gmail.com' will get us the data of that user. But when we try to log in with "Test@gmail.com" we will get the "No account found" notification.
nopCommerce version: 4.60
Source: https://www.nopcommerce.com/en/boards/topic/98813/email-case-sensitivity