An email that is rejected by an email server for a permanent reason. An email may hard bounce if a recipient email address or domain name doesn’t exist—or the recipient email server has completely blocked the delivery. There are, however, occasionally times when a valid email address will hard bounce.
3 Quick And Easy Ways To Build A Profitable Opt-In List
You finally realize that you need a good opt-in list. After reading countless articles and sought expert advices and have read many success stories of people creating a small fortune with opt-in lists you finally decide to have one of your own.