Whoa - yeah my spam folder has two sent to "dropbox.com@<mydomain>.com"
From ".Вишняков@direct.nacha.org" <kohinoorwm87@lifesep.com> and ".Белов@fdic.gov" <runoffiz@smarterbythemonth.com> with subjects of "Declined Direct Deposit payment" and "Update of the security software is required!"
I do get lots of "random" spam sent to addresses like "fcbb3a43@<mydomain>.com" but I can't believe the moderators really think that a "random" guess would land on "<domain>.com@<mydomain>.com" sigh