Transparency: Clearly explain who you are, why you are contacting them, and how you obtained their email address. Personalization: Tailor your emails to individual preferences and behaviors to show that you understand and value them. Content Quality: Provide valuable, relevant, and high-quality content that meets the needs of your audience. Consistency: Maintain a consistent sending schedule and message tone to build familiarity and reliability. Security: Use secure methods for data collection and storage to protect your subscribers' information.