How do I update Supplier email information for all employees set up as suppliers in Payables

Hello,

We have currently setup employees as suppliers in Payables. In order for them to receive the Separate Remittance Advice, we need to add their email ids to the suppliers. What is the best way to update email ids for all the suppliers? Is there an API or should we consider Dataloader professional.

Navigation path:

1. Payables Manager -> Suppliers -> Entry

2. Search for the supplier

3. click on update

4. go to payment details

5. go to Separate remittance Advice delivery

6. Update payment details at site level

7. Set delivery method to email

8. Enter email id

How do we upload all the email ids for all the employees set up as suppliers like this. Is there an API or should we use dataloader?