On Fri, Jan 6, 2012 at 1:54 PM, Nick Silkey <[email protected]> wrote: > AOL and Hotmail do. We use them. I'm pretty certain GMail unfortunately > doesn't have one.
Yahoo has a feedback loop [1]. Also from Yahoo's best practices [2]: "Segregate your mail streams by IP addresses and/or domains since Yahoo! Mail keeps reputation data about each IP address and domain you send from. For example, by segmenting the mail stream that delivers marketing mail from another that sends transactional messages, you make it easier for Yahoo! Mail to determine and assign each mail stream's reputation." [1] http://feedbackloop.yahoo.net/ [2] http://help.yahoo.com/l/us/yahoo/mail/postmaster/basics/postmaster-15.html -Anton
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