More E-Mails Blocked, Return Path Study Finds By: Christine Blank Contributing Editor
E-mail marketers still need to monitor ISPs' e-mail blocking vigilantly, as the problem has worsened.
Twenty-two percent of permission-based e-mail was blocked by top
ISPs in 2004, up 3.3 percent from the second half of 2003, e-mail
management firm Return Path, New York, found in a new study.
