Low cost mass storage. I don't know if it's any good yet.
But what does it have to do with Email/SMTP ?
Very cheap, extremely slow:
http://www.crn.com/news/storage/2400059 … access.htm">http://www.crn.com/news/storage/240005963/amazon-glacier-low-cost-cloud-archiving-but-not-if-data-needs-occasional-access.htm
I like the idea of moving objects out of s3 to glacier after X amount of days based on a policy in s3, it'll reduce the cost of long term backup storage.
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