Have you ever tried to send an email but had it rejected or returned? This is called “bounce.” Email bounce is when you try to send a message but the recipient’s server rejects your mail. This can be especially frustrating for businesses, as email marketing can be an incredibly effective (and cost-effective!) way to attract new customers. There are several reasons your emails may bounce, which we will get into later. Let’s start by explaining the 2 primary types of bounce.