I checked my e-mail accout that I used for dropbox and There is a spam mail coming from ...@direct.nacha.org which is the same domain which one of the customer

I checked my e-mail accout that I used for dropbox and There is a spam mail coming from ...@direct.nacha.org which is the same domain which one of the customer in forum received. So it seems they are right, this is not a random guess.