Its quite a annoying problem I have. SCA has a funciton

customer::sendEmail()

where you can email a logged in user. But I need to email a not logged in user - a user who has registered on our old website and tried to register on our new one. When they try I will email them saying 'We've migrated, please click this link to consolidate your account'. So I have to use

nlapiSendEmail

.