General deliverability guidance for large-scale legal notification sends in Eloqua

Title
General deliverability guidance for large-scale legal notification sends in Eloqua

Background
I would like to ask for general guidance on the recommended deliverability approach for large-scale legal or privacy-related notification emails sent through Eloqua.

In some cases, customers may need to send important non-marketing communications, such as privacy policy updates or terms updates, to a large audience. Depending on the nature of the notification and the customer’s legal requirements, the audience may include contacts who have globally unsubscribed.

Question
For this type of send, what would be the recommended approach to help reduce the risk of spam classification, blocklisting, or sender reputation impact?