At RB2B, each account must be associated with a unique email address, which serves as the primary identifier for the account. Currently, our system does not support the functionality for a single email address to manage or switch between multiple accounts. This means if you require separate accounts for different purposes, you will need to use a different email address for each account you create. This approach ensures secure and distinct access to each account.

Is your company using Google Workspace to host your corporate email? Gmail has a couple hidden tricks that give you unlimited email addresses with your single email address. You can read more about it here.