You can improve your email delivery rate by cleaning your email list. Remove inactive or invalid email addresses. You should check your sender reputation. A poor reputation can affect your delivery rate. You need to avoid using spammy words in your emails. Test your emails using spam filters before sending them. You should authenticate your domain with SPF, DKIM, and DMARC records. This can improve trust with email providers. Segment your audience to ensure emails are relevant. Ensure your content is high quality and mobile-friendly. Consistency and good practices can gradually improve your email delivery rate over time.