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This is not my area of expertise, but I do know that for a reader in Gmail, the behavior is always the same: Google downloads the image and serves it to the use
by chatmasta 8y ago
This is not my area of expertise, but I do know that for a reader in Gmail, the behavior is always the same: Google downloads the image and serves it to the user from their own servers (designed to beat tracking pixels).
You might find this SendGrid post [0] helpful, but probably you've seen it already.
[0] https://sendgrid.com/blog/embedding-images-emails-facts/ https://sendgrid.com/blog/embedding-images-emails-facts/