Hi there.

Suppose a site where you have

RequireUniqueMail=false

in your site ini.

trying to do some user import usign eZContentFunctions::createAndPublishObject, it happens that fromString method from eZUserDatatype has following piece of code

if ( eZUser::fetchByName( $login ) || eZUser::fetchByEmail( $email ) )
            return false;

so, it will not work as expected. User data will not be stored properly because of that false.
eZUser::requireUniqueEmail should be added to that check

Steps to reproduce

summary says it all