I received the same email. But a couple of things made me worry about it being Phishing too.
1). The address on the bottom of the email wasn't the usual one, instead it was
Airbnb Payments UK Ltd.
40 Compton St., London, EC1V 0AP
2). I'm not able to re-add our payment method. First error is when you try to click on the "Pricing & Fees" hyperlink, and secondly when you do try to click SUBMIT there's an error message. My husband and I tried this on Google Chrome, on Mac and Windows, from links we clicked within the Airbnb website.
I first submitted #2 to Airbnb Superhosts help, and they just said "Try Chrome, or contact Payoneer" (Um, not helpful). And I've sinced submitted this to airbnb asking if it's a legit email, because of #1 (new email footer address?).
The email was sent from discover@airbnb.com
We have been regularly hosting Airbnb guests this year.
It can be annoying when Airbnb ask us to re-submit info, but once we didn't and then they deducted with-holding tax from a payout because they thought I was a US citizen (despite non-US passport, non-US listing, and non-US bank account for payout). So now I try to do everything they ask.