feat: add extra options to email rule

[adamcikado]

Proposed changes

Add extra options to email rule.

Types of changes

• [ ] Bugfix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• [x] I have read the CONTRIBUTING doc
• [x] Lint and unit tests pass locally with my changes
• [x] I have added tests that prove my fix is effective or that my feature works.
• [x] I have added necessary documentation (if appropriate)

[thetutlage]

Can you please add tests for the same?

[adamcikado]

@thetutlage added

[thetutlage]

Thanks for taking out time to do this PR :)