Description

Extracts out the test refactoring of mail_privacy.bats from #3012

• Author of commit is actually @georglauterbach who requested I extract it from their PR.
• Should not be merged until that referenced PR is as it depends on changes it introduces.

Type of change

• Improvement (non-breaking change that does improve existing functionality)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• New and existing unit tests pass locally with my changes