Delivery Rate (DR)

Delivery rate tells you how many of your emails reach the receiving mail server without bouncing. It is calculated from the emails you send and the ones that fail. A high delivery rate means mailbox providers accept most of your traffic. It is a basic health check for your sending.

People use delivery rate to spot problems with list quality or technical setup. If it drops, it often points to bad addresses, authentication issues, or reputation trouble. Watching this number over time helps you catch issues before they become bigger. It also gives helpful context to other metrics like open rate.

As a simple habit, review delivery rate after every big campaign. If it falls below about 95 percent, look at your bounce report and remove bad addresses. Then confirm your DNS records and sending domain are set up correctly. Small fixes here protect your reputation and make every later send more effective.