About one in five marketing e-mails didn't get delivered in the second half of last year, according to a new report by Return Path, Mediapost reports.
Excite filtered our 42.9 percent of messages, while Gmail filtered 40.4 percent, Lycos didn't deliver 33.8 percent, and Adelphia failed to deliver 31 percent of messages. On the other end of the spectrum, EarthLink filtered out just 7.8 percent of e-mails, while Mac.com, Compuserve, and USA.net all filtered out less than 10 percent. AOL didn't deliver 12.4 percent of messages.
As for corporate filters, MessageLabs didn't deliver 30.5 percent of messages, Postini failed to send 24 percent, and Brightmail blocked 21.5 percent.
