Email delivery failure: 11 common causes (& how to fix them)

Email delivery failure occurs when an email fails to reach its intended recipient due to various issues, which can be frustrating for senders aiming to engage with their audience. Common causes include a high complaint rate, email infrastructure issues, permission-based problems, invalid email addresses, full mailboxes, spam filters, blocklisting, server issues, attachment problems, sender authentication issues, and recipient email configurations. To address these challenges, senders are encouraged to adopt best practices like maintaining a clean email list, ensuring proper email server configurations, using authentication mechanisms, and closely monitoring email reputation. By understanding and mitigating these issues, senders can improve email deliverability and maintain effective communication with their audience.