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> for every extra person that opens an email the picture is coming from google's cache and thus the open is not counted Each e-mail has a unique image URL; Goo
by dangrossman 13y ago
> for every extra person that opens an email the picture is coming from google's cache and thus the open is not counted
Each e-mail has a unique image URL; Google has to make a request for each individual mail even if they're caching images.
- tijs 13y agook makes sense. a file hash might fix that and save google some bandwidth but i imagine they do not want to break tracking completely for now...
- dangrossman 13y agoTo hash the file you first have to download it. Downloading it is the tracking action, not showing it. Deduplication does not affect open tracking pixels.