CVE-2014-8839
Spotlight in Apple OS X before 10.10.2 does not enforce the Mail "Load remote content in messages" configuration, which allows remote attackers to discover recipient IP addresses by including an inline image in an HTML e-mail message and logging HTTP requests for this image’s URL.
Date published : 2015-01-30
http://lists.apple.com/archives/security-announce/2015/Jan/msg00003.html