The top five ISPs for senders to reach consumer inboxes in the United States ranked in order of difficulty were BellSouth, Gmail, MSN, Hotmail, and Yahoo!.

The top five ISPs for senders to reach consumer inboxes in Canada were Primus.ca, Shaw, SaskTel, MTS, and Bell. Primus.ca which uses Postini as part of its email filtering system, failed to deliver 55 of emails that marketers sent to Primus.ca users which represents a 2 increase from the first half of 2009. The top five ISPs for senders to reach consumer inboxes in the United Kingdom ranked in order of difficulty are Demon, BT Internet, AOL, Orange, and Yahoo!.