If a contact has bounced, he or she is completely and permanently blocked.
This means that the contact can never be contacted again. A permanent block occurs if, for example:
- the email address is wrong - either because there is a typing error in the email address, or because the recipient has deleted this email address.
- something is wrong with the domain (what is behind the @) - again, a typo may be the cause.
- the e-mail is rejected because of suspected spam.
- the sender domain is rejected because of a bad reputation.
If you were to write to contacts who are already blocked, this would mean a negative reputation. The emails are much more likely to be rejected as spam and no longer arrive in your recipients' inboxes - a circumstance that wants to be avoided.