Measuring credibility can be somewhat subjective, but there are key metrics and indicators you can monitor:
Sender Score: This score, provided by companies like Return Path, measures your sender reputation. Subscriber Feedback: Pay attention to feedback from your subscribers, including complaints and unsubscribes. Engagement Rates: High open and click-through rates are good indicators of trust and interest. Deliverability Rates: High deliverability rates suggest that ISPs view your emails favorably.