Your inbox got spammed by auto-responders, but mine got spammed by my clients.
And also my business is not as large to have an auto-responder. I am doing a very small business to tackle my clients. I am not a busy, so I find enough time to answer my clients. I am very much known for my service to my customers. Its so foolish to set an auto-responder for customers. If you do so then you have more probability to loose customers.