Return Path: ISPs Wrongly Label Opt-In E-Mails 'Spam'
The study found that the Internet service provider to block the most e-mail was RoadRunner, which tagged 36 percent of the opt-in e-mail messages as spam, followed by Mail.com at 34 percent, and Comcast at 31 percent. EarthLink blocked the lowest proportion of e-mail, at 5 percent, while BellSouth identified 6 percent of legitimate messages as spam, and CompuServe wrongly blocked 8 percent of messages. Per campaign, blocking rates ranged from 57 percent to 1 percent.
-- Wendy Davis