Seeing Amazon's SES with such a large share is no surprise, but it is a little disheartening knowing about this limitation: "Amazon SES only supports open trac

Seeing Amazon's SES with such a large share is no surprise, but it is a little disheartening knowing about this limitation: "Amazon SES only supports open tracking over HTTP domains." https://docs.aws.amazon.com/ses/latest/DeveloperGuide/configure-custom-open-click-domains.html https://docs.aws.amazon.com/ses/latest/DeveloperGuide/config... Yes, big webmail providers fetch the tracking pixels for you and serve them to your browser over HTTPS, but not every mail provider does that, sometimes for good reason, leading to problems like this: https://protonmail.com/support/knowledge-base/connection-not-secure-warning/ https://protonmail.com/support/knowledge-base/connection-not...