The Limit Mail feature in the Parental Controls functionality in Mail on Apple Mac OS X does not properly enforce the correspondence whitelist, which allows remote attackers to bypass intended access restrictions and conduct e-mail communication by leveraging knowledge of a child's e-mail address and a parent's e-mail address, related to parental notification of unapproved e-mail addresses.
Apple Mail.app 3.5 on Mac OS X, when "Store draft messages on the server" is enabled, stores draft copies of S/MIME email in plaintext on the email server, which allows server owners and remote man-in-the-middle attackers to read sensitive mail.
Mail.app in Mac OS 10.4.2 and earlier, when printing or forwarding an HTML message, loads remote images even when the user's preferences state otherwise, which could result in a privacy leak.