There were indeed proposals to use RSS pull style polling to replace push style email. But the main drag on productivity of email in a business setting is not e

There were indeed proposals to use RSS pull style polling to replace push style email. But the main drag on productivity of email in a business setting is not external spam, but internal occupational spam from colleagues misusing email and overly verbose automated emails, whether out of cluelessness, incompetence, CYA or whatever other reason. A company would be perfectly justified in settings standards for appropriate use of email.