Mail Archiving Expert provides not only real-time archiving to eliminate the trouble of deleting important emails by mistake but also complete email lifecycle management. Archived emails are moved automatically to different storage media according to different departments' policy of maintenance time. The flexibility of access authorization management combined with the ability of assigning results to other administrators for refined search to accurately find emails, preventing granting unneeded permission and risk exposure of mail contents to those who should not be given the authority.