So which ISP blocks the most permission-based emails?
For many year, I thought AOL was leading the show with the highest email block (permission-based) rate, but boy.. I was so wrong. Return Path, a email delivery firm did a study on this topic recently and published very interesting numbers.
They reported that overall, the delivery rate has been increased to 19.2% from 21% last year due to sophisticated technology. But considering that almost 20% of our permission-based emails are not getting delivered, I think it is not good enough. Take a look at some stats.
% of Blocked Emails (Permission-based)
Highest Five
Excite - 50.7%
Adelphia - 33.5%
Gmail - 34.3%
Hotmail - 22.7%
MSN - 22.4%
Lowest Four
CompuServe - 11.8%
USA.net - 13.2%
AOL - 14.1%
Yahoo - 15.2%
Gmail has one of the highest % of emails blocked, but they have only 2.87% of false positives (emails incorrectly identified as spam). Which is below an average (3.29% in the US).
If you have a list or send out newsletters, you should educate your list members about properly whitelisting your email address. Also consider using a mailing service company that works with various ISPs to get their emails delivered properly.
October 27th, 2006
Written by Bo Bang
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There are some sites out there that do a really good job of providing that info for subscribers (ie whitelisting instructions.) I think sitesell.com has it.
Posted on October 30th, 2006Could you provide more details about mailing services which work with ISPs? I’ve always had trouble with my mailing list even though all of those on my list have opted in. Thanks!
Posted on December 11th, 2006