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They do this already. Similar to Github’s Cameo service for proxying readme images.
by orf 7y ago
They do this already. Similar to Github’s Cameo service for proxying readme images.
- zamadatix 7y agoWow, I just checked and yep there it is - google URL! I wonder if it caches automatically or only when read. If the latter I bet you could game the system by sending a tracking pixel with a unique source URL. Will have to stand up a test server and see what resource gets requested when.
- mike_d 7y agoIt varies by the reputation of the domain. Most images get hit once when the email is initially opened, and cached basically forever. If you send tons of tracking pixels to multiple users you'll eventually see the images being loaded and cached as soon as you deliver the message.