The MobileMail component in Apple iPhone OS 3.0 and 3.0.1, and iPhone OS 3.0 for iPod touch, lists deleted e-mail messages in Spotlight search results, which might allow local users to obtain sensitive information by reading these messages.
https://exchange.xforce.ibmcloud.com/vulnerabilities/53182
http://www.securityfocus.com/bid/36337
http://support.apple.com/kb/HT3860
http://secunia.com/advisories/36677
http://lists.apple.com/archives/security-announce/2009/Sep/msg00001.html