I don't know Mac mail. As for website acceleration, there's many forms.. there's still software people try to push that basically installs add-ons into browsers

I don't know Mac mail. As for website acceleration, there's many forms.. there's still software people try to push that basically installs add-ons into browsers... Then there's simply add-ons you can download, which could easily do anything. For mail clients, it comes down to implementation there as well, but it's less likely a major vendor would add tracking protection checkboxes, then fail on them too badly..... Less likely... And they usually don't have add-ons of the like that would be a problem.