What action should a Campaign Business Practitioner take to ensure email deliverability?

The action of regularly cleaning the recipient list to remove inactive addresses is crucial for ensuring email deliverability. This process involves identifying and removing email addresses that have not engaged with previous campaigns, whether by not opening emails, not clicking on links, or bouncing. High engagement rates are important for maintaining a good sender reputation with internet service providers (ISPs). If a sender's emails consistently go unanswered or result in bounces, ISPs may categorize future emails as spam or block them entirely, resulting in poor deliverability.

By keeping the email list updated and focusing on engaged users, a Campaign Business Practitioner not only ensures that messages reach a relevant audience but also enhances overall sender reputation. This practice helps improve open rates and click-through rates, further solidifying the sender's credibility with ISPs, which ultimately leads to better email deliverability.

The other choices, while potentially beneficial in certain contexts, do not address the core issue of maintaining a high-quality recipient list as effectively. For instance, using only the company's domain may seem sensible but doesn't directly enhance deliverability if the recipient list is not managed well. Limiting the number of emails sent per day might alleviate some issues that come from overwhelming users, but it does not guarantee that emails will reach the inbox. Sending