Stephanie Miller of Marketing Profs asks the question:
“Is it better to get permission up front for your email marketing program, or just beg for forgiveness later?”
In short, the answer is you should ask people’s permission before you put them on your list, but in reality, it’s the wrong question. People who aren’t interested in your services or your products and therefore your emails, probably don’t belong on your list. Stephanie actually suggests cleaning your lists of uninterested recipients and focus all of your energy on your more promising candidates.