The CAN-SPAM act is pretty clear, it covers "any electronic mail message the primary purpose of which is the commercial advertisement or promotion of a commercial product or service."
Isenzo se-CAN-SPAM sicace bha, sihlanganisa "noma yimuphi umlayezo we-elekthronikhi inhloso yawo okuyisikhangiso noma ukuthengiswa komkhiqizo noma insizakalo yezentengiso."