Hard bounce is a permanent delivery failure that occurs because the recipient's email address is invalid or no longer in use.

  • Typically the domain name no longer exists or it no longer has registered mail servers. 
  • The email address can also be invalid due to typos.


Popular posts from this blog

Fixed Windows warning: agent returned different signature type ssh-rsa (expected rsa-sha2-512)

How to install/renew SSL Certificate for Glassfish