Since Microsoft rolled out the Focused and Other tabs, we're starting to see a marked decline in open rates for emails sent to Hotmail/Live/MSN/Outlook domains. I suspect that similar to when Gmail rolled out their filtering tabs (Primary, Promotional etc.), we will continue to see lower open rates for marketing emails.

Even moving emails from Other to Focused tabs doesn't seem to help the filtering to better sort emails as they arrive. Perhaps it will take more time for the platform to learn about what the user considers to be important vs. not.

Have you also seen lower open or read rates for Microsoft domains? I'd like Litmus to share any results from what they've seen.

Thanks, John