how is this working ? Gmail caches pixels - https://help.litmus.com/article/166-how-are-gmail-opens-reported-within-email-analytics https://help.litmus.com/arti

how is this working ? Gmail caches pixels - https://help.litmus.com/article/166-how-are-gmail-opens-reported-within-email-analytics https://help.litmus.com/article/166-how-are-gmail-opens-repo... >When Gmail automatically downloads and caches images, those cached images—including open tracker pixels, like the ones used with Email Analytics—are stored on Gmail’s servers. Gmail then loads the same images from the same servers for everyone—regardless of whether they open using Gmail in a web browser or a Gmail Android or iPhone/iPad app.