Definitions for "Hard bounce"
E-mail message that is undeliverable because of an erroneous address or other permanent cause.
This is when an email is returned undelivered because the recepient or host is unknown, or the sender has been blocked by the recepient's ISP or Mail Server.
A hard bounce is an e-mail message that has been returned to the sender because the recipient's address is invalid. A hard bounce might occur because the domain name doesn't exist or because the recipient is unknown. When the recipient's name is known, e-mail may be rejected because the sender's mail box is full or for other reasons. This is known as a soft bounce.
Keywords:  copy
Keywords:  phone