2016-04-04 UTC
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@UpdraftPlus Trackbacks vs Pingbacks vs Webmentions for #WordPress, a history of Linkbacks: http://premium.wpmudev.org/blog/trackbacks-pingbacks-webmentions/ @wpmudev https://twitter.com/UpdraftPlus/status/716935664009396224/photo/1 (twitter.com/_/status/716935664009396224)