I think so, and OS X allows you to turn that off. Maybe the headline should be "If you care about privacy, check your mail client settings"? Using 10.9 with "d

I think so, and OS X allows you to turn that off. Maybe the headline should be "If you care about privacy, check your mail client settings"? Using 10.9 with "display remote images" disabled, I asked https://emailprivacytester.com/ https://emailprivacytester.com/ to send me a test message. The test page indicators didn't budge when I opened the test message. Then I clicked on "load remote images" and naturally quite a few turned red. But that's why I disabled that feature in the first place.