Hacker News new | ask | show | jobs
by chatmasta 2687 days 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/