Sender Authentication: Settings like SPF, DKIM, and DMARC are essential for verifying that your emails are not spam. These protocols help ISPs verify the authenticity of your emails, improving deliverability. Reply-to Address: Ensure that your reply-to address is monitored. This increases engagement and helps you promptly respond to customer queries. From Name and Email: The name and email address that your recipients see should be easily recognizable and trustworthy. This can significantly impact your open rates. Unsubscribe Link: Always include an easy-to-find unsubscribe link to comply with CAN-SPAM regulations and improve your email reputation. Segmentation: Use segmentation to send targeted messages to different groups within your email list, improving relevance and engagement.