On Wed, 13 Jun 2018 at 20:50, Michael Rathbun <m...@honet.com> wrote: > > On Wed, 13 Jun 2018 10:13:35 -0600, Paul Kincaid-Smith <p...@emailgrades.com> > wrote: > > >if Microsoft's filters were aggressively moving heaps of *wanted* email out > >of > >the inbox, I'd expect Outlook's read rates to be lower, but my metrics show > >that read rates at Outlook are often in line with read rates at Gmail and > >Yahoo! > > ... > > >(I'm probably measuring read rates differently than you. I use IMAP's > >"message read" flag, not an open tracking pixel or click-tracking link.) > > I confess that I am not at all sure what you are doing, as we would normally > not have IMAP access to a recipient's mailbox. > > Based on the usual crude tracking pixel and click-tracking links, we often see > open rates at hotmail/msn/etc at under half those seen elsewhere. > > Thinking about performance objectives (having been a spam analyst for the > Office 365 platform for a couple of years, ending just when the consolidation > with the freemail service began), reflecting upon the fact that non-spam email > can be several orders of magnitude more expensive to process and place in the > inbox than spam, my thought is that > > 1. It can be extremely economical to consult the recipient's local rules > before even beginning to filter an incoming message; if it's subject to the > local safe-sender list, mark it as safe and terminate all filtering. At least > a 10,000:1 resource saving. If it would be nabbed by the recipient's > blocked-sender list, mark it as spam and likewise send it on its way. > > 2. Given the great desirability of completely eliminating the filter process, > devise as many ways as possible to populate each recipient's safe and banned > lists, regardless whether they would like you to do that. > > mdr > -- > "There will be more spam." > -- Paul Vixie > > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
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