The M3AAWG Email Metrics Program: The Network Operators’ Perspective is compiled quarterly from aggregated data provided directly from M3AAWG member ISPs, email providers and network operators. It is a voluntary program and each report covers at least 100 million mailboxes. Current reports include data for almost 500 million mailboxes. The complete archive of reports is provided here for those who want to investigate trends since the reports were initiated with data from the last quarter of 2005.