Mass email marketing does work, but the key is restraint. If you send out too many emails too fast, people are going to be unsubscribing to clean up their inboxes. Few people will be as passionate about your business as you are, so make sure to match their interest.
Like we mentioned earlier, email marketing ROI can be as high as 4,400%, so you’d have to be doing something awfully wrong for email marketing not to net you more money.