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An email bounce is when an email isn’t accepted by a business or Internet Service Provider’s mail server for a specific email address and a code is returned that the message has been rejected. The bounces are defined as either soft or hard. Soft bounces are typically temporary and are basically a code to tell the sender that they may wish to keep trying.
… being sent to again. Sending repeatedly to a hard bounced email address can get your email service provider blacklisted. Soft Bounce and Hard Bounce Code Lookup and Definitions Code Type Description 421 Soft Service not available 450 Soft Mailbox unavailable 451 Soft Error in processing 452 Soft Insufficient system storage 500 Hard Address does…