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Rob Braxman Tech
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Comments by "" (@MsHojat) on "Thunderbird is Going to be Better!" video.
As far as I recall for a long time Microsoft mail (I presume just their e-mail service, not as likely e-mail clients) downloads remote content to their servers first, making beacons less useful since they just always get marked as read as soon as the e-mail is sent, regardless of whether the user ever opened the message.
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