UploadRecipientToList
Description
Authentication
Password InArgument<String> REQUIRED
Username InArgument<String> REQUIRED
Misc
IdList InArgument<Int32> REQUIRED
Recipient InArgument<Recipient> REQUIRED
Result OutArgument<Int32>
SendConfirmEmail InArgument<Boolean>
Add the recipient in "Pending" state and send an email to confirm the subscription. This is the only way to subscribe again an unsubscribed recipient