Library

You compose a new email and queue it to send to your list of subscribers. You expect it to show up in their inboxes a few minutes later, right? But then a customer contacts you asking why he never got his coupon. What happened? You sent the message out to all of your subscribers, but not everyone received your message. Some of them found it in their junk folders, and some of them didn’t find it at all. You just had a deliverability problem. But what does that mean, and how do you fix it?