What Do You Call Spam That Comes Through USPS?

I recently realized that Alison and I receive unsolicited mail, at various frequencies, from seven different schools. Alison gets mail from these:

• Johns Hopkins University
  
• Harvard University
  
• Emory University
  
• University of Illinois
  

Meanwhile, I get mail from these:

• Johns Hopkins University
  
• Georgia Institute of Technology
• Rice University
  
• Woodward Academy
  

So, apparently education (and employment) has a cost beyond the financial one, and it's called junk mail.