Lyris recently released their Q1 2005 ISP Deliverability Report Card. The data they gathered indicated that Internet and email service providers are currently operating at an average gross deliverability rate (total number of messages delivered to the email inbox and bulk folders, combined, divided by the total number of messages sent) of 92.5 percent. The average rate of inbox deliverability is somewhat lower at 88.5 percent. They also found that U.S. providers earned a deliverability average of 91.3 percent (gross) and 87.9 percent (inbox).
eINFO – a collection of articles and studies about email marketing.