For example, say an HR department sends out an e-mail to all 1,000 employees announcing the company picnic and attaching a 1 megabyte (MB) jpeg map of the location. Depending on the e-mail system, when this e-mail and attachment is saved by employees, you potentially could have tens to hundreds of copies if this 1 MB e-mail consuming hundreds of MBs of storage. A CAS storage device would ensure only one copy of the e-mail is saved.
Many e-mail archiving products already in the ability to store single instances of messages in their archive. Before purchasing a CAS storage device for e-mail archive storage, you should double check with your vendors to see if they already offer it in their product.
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