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.
The 3 Things To Avoid When Emailing Your List
When you decide to have an opt-in list, it is not just a matter of sending your subscribers your promotional newsletters or catalogs.
