Email Sending is an art and for better results and to avoid our email sending strategy to fail we need to understand the nitty-gritty of the factors affecting the reputation of an Email sender. Following Points should be considered and kept in mind to avoid account Blockage & Blacklisting and Increase the positive results of our Email sending 1. Email to be sent to Subscribed User only. 2. Hard bounce ratio should not exceed 5% of the total subscriber count. 3. Spam Complaint ratio should not exceed 0.1% of the total subscriber count. 4. Email data should not be a purchased list 5. Email Subscriber List should not change frequently 6. "Sender address domain" should not contain any blacklisted domain or a domain pointed to blacklisted IP. To verify check the domain blacklist status on mxtoolbox.com 7. Content should not contain any link containing any blacklisted domain or a domain pointed to blacklisted IP. To verify check the domain blacklist status on mxtoolbox.com