The System.Web.Security.Membership class membership provider specified in the CreateUserWizard.MembershipProvider property can restrict the e-mail addresses that it will accept. The CreateUserWizard.InvalidEmailErrorMessage property is displayed when the e-mail address entered by the user does not meet the requirements for the e-mail address set by the membership provider. The actual requirements for the e-mail address are determined by the membership provider, and might be different for different providers.

The value of this property, when set, can be saved automatically to a resource file by using a designer tool. For more information, see System.ComponentModel.LocalizableAttribute and ASP.NET Globalization and Localization.