I think: Gmail started caching the email/images in late 2013 to protect against this. So if the sender is watching, they only see gmail servers pull it once to their cache. The gmail user only ever sees or gets content…
I think: Gmail started caching the email/images in late 2013 to protect against this. So if the sender is watching, they only see gmail servers pull it once to their cache. The gmail user only ever sees or gets content…