As discussed before, the best course of action would be to show the email you have to CP support and ask them if it is legitimate.
You did not mention whether there is a PGP signature present, but if it is, you should verify it.
Also check the email’s full headers for details.
I have still not received any such email from CoinPayments, and nobody else has mentioned this to me. I have not seen this mentioned on the CoinPayments website, blog, or twitter account. Such an important announcement should be more prominent if it was legitimate.