There are nine common threats that affect the personal, private and confidential nature of Email communications.
The entire document is available in Adobe's pdf format Reducing Email Threats
MyMailSM employs RAID 5 or RAID 6 disk arrays for redundant/fault tolerant email message storage, which eliminates the need for archiving the Secure Email message files. By default, MyMailSM maintains a redundant/fault tolerant copy of the secure email storage on each secure email server rather than archiving data via some asynchronous mechanism. MyMailSM does this for the following reasons: