Is it truly interesting and to the point? Is there fresh content in every issue?
Are the articles short? Most people have an attention span that is very short, so make sure your articles fit the bill.
The first thing that many companies rightly ask is: Does it work? That’s a difficult call to make. However, if you spend four hours creating a mail blast and send it to 10,000 addresses and get a 2% response rate – 200 companies that is a fair return on your labor.