Kindle spam

Received the following email from Amazon this morning:

Dear Customer,

The following document, sent to you by [email protected] could not be delivered to your Kindle because the sender is not in your Kindle approved e-mail list:
* the-laptop-millionaire-anastasi-en-17724.mobi
.
.
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Seems like the spammers are always on the lookout for new (to me, anyway) ways to spread their rubbish