However, there is a feature that separates the login and email address, where the login could be test@test.com, but the associated email address for this login is your.name@company.com. If this feature is enabled and you needed to reset a password, you would still enter the login (test@test.com) and the reset password email would be sent to the associated email address (your.name@company.com).
If you would like the feature that allows for separate login and email addresses, please contact Marketo Support.