What configures Drupal to send emails on the create or update of an unpublished content? [closed]

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My Drupal installation attempts to send emails to a number of users whenever I create or update content but do not publish it. But because sending email is not configured errors are generated.

I don't know what configuration item I could have deliberately or accidentally set to cause that. Is there any setting or module that could cause that?

I don't think I have configured any Rules or Workflow settings to send emails, and it only occurs when the item is unpublished

Answer 1

The culprit turned to be the Antispam module, which is the client for the Akismet anti-spam system.

Its default setting causes an email to be sent to some administrators whenever a module is updated.

What baffled me was why that setting applied only when an unpublished item was created or updated.