4.3.3 Email Bounce Error Reason Message Features Not Supported By Receiving System: Delayed Message The email message has not yet…

4.3.2 Email Bounce Error Reason Receiving Email System Not Operating: Delayed Message The email message has not yet been delivered…

4.3.1 Email Bounce Error Reason Email System Is Full: Delayed Message The email message has not yet been delivered because…

4.3.0 Email Bounce Error Reason Unknown Issue With The Receiving System: Delayed Message The email message has not yet been…

4.2.4 Email Bounce Error Reason Mailbox Has A Mailing List System Issue: Delayed Message The email message has not yet…

4.2.3 Email Bounce Error Reason Message Is Too Long: Delayed Message The email message has not yet been delivered because…

4.2.2 Email Bounce Error Reason Mailbox Is Full: Delayed Message The email message has not yet been delivered because the…

4.2.1 Email Bounce Error Reason Mailbox Is Not Accepting New Messages: Delayed Message The email message has not yet been…

4.2.0 Email Bounce Error Reason Unknown Issue With Mailbox: Delayed Message The email message has not yet been delivered because…

4.1.9 Email Bounce Error Reason Message Routed To Non-Email System: Delayed Message The email message has not yet been delivered…