On average, we receive one manuscript submission each day, either in the mail, via email, or on the phone. A call almost certainly means the author has not read our guidelines. See here and here for more on that.
Sadly (or thankfully, depending upon your perspective), we receive many more publishable manuscripts than we can produce. That means we must often write the infamous rejection letter.
Other sources for publishing are available. Here is an article that discusses and disects the pros and cons of many of them. As a consultant to the industry, I am often asked about these options. I am a big fan of getting information out to the end user however that is possible. But . . .
Or in this case author beware.