I am with Dwolla have not used in ages but did not receive any email. As Ceasesmith suggested I would go directly to the Dwolla website to A see if they have a similar message on site and B transfer any funds safely into an linked bank account. If Dwolla were really stopping transfers into your bank account what would be their purpose of existing going forward.
Just checked my Dwolla last used for Ace Mystery Shopping and no such alert on the site. I indeed think it was a spoofing email with possible fake look alike website.
Shopping Western NY, Northeast and Central PA, and parts of Ohio and West Virginia. Have car will travel anywhere if the monies right.