How to Set field values to NULL using Data Import

Hello,
Is it possible to use Data Import to set Lead emails to a blank value?

I have a CSV file listing several hundred bounced emails. I want to delete those bad email addresses from the Email field for those Leads and leave the field blank.

Is this possible?

I have tried to upload a CSV file with tow fields: ID, and Email, with the Email field blank on each row. ERPNext reports “success” but failed to change the value in the email field.
Thanks,
Tom

Hi

Those Data fields can be updated as blank by working from list view of Lead docytpe as following;