Enables to send a link to a webform draft via email.

Configuration

1. Visit /admin/structure/webform/manage/{WEBFORM}/settings/submissions
and check the 'Allow your users to save and finish the webform later' option.

screenshot-1

2. Check the 'Allow users to update a submission using a secure token' option.

screenshot-2

https://www.drupal.org/project/webform_send_draft_link