This morning, I received two very authentic looking emails from "auto-shipping*@*amazon.co.uk" to two of my IDNet accounts. I know these were not authentic as they came with attachments (which genuine Amazon emails don't), plus, I have a different (non-IDNet) email account for my Amazon purchases.
I have received similar emails to my IDNet accounts before, mostly with attachments purporting to be invoices of some description, but they have not previously appeared to come from senders I have dealings with. The 'Amazon' emails, however, were the same sort of format.
So, just a warning - double check your Amazon emails before opening!