Hi,

Archiving the user will not stop sending emails to the user. By default when we create a user the selection field notification_type in res.users will be set to emails. You can update this field value to inbox in order to handle the acknowledgments within odoo.

Try the below code, 

self.env['res.users'].create({
    'name': 'test user',
    'login': 'test',
    'email': 'p.p@example.com',
    'notification_type': 'inbox',})

Thanks