ReturnPath recently reported results of a year long study of permission-based email penetration. George Bilbrey, ReturnPath’s head of Delivery Assurance, said that permission-based marketers need to take special care with structuring emails for optimum penetration, as filters are getting cranked tighter and tighter by the minute (he didn’t actually say the cranking part – I just threw that in for good measure, as it is the case).
While the stats vary widely among the ISPs monitored, they are worth a look. You can catch them here: InternetRetailer.com – Daily News for Wednesday, March 23, 2005.
For those small marketers who still are getting the daylights bounced out of them and can’t figure out what to do, just let ReturnPath do the tough work for you.