4.7.6 Email Bounce Error
Reason
Message Encryption Issues: Delayed Message
The email message has not yet been delivered because an email server involved with sending the message had difficulty processing the security features of the message.
How to fix?
If intentionally sending ecrypted email messages, check the sender’s email program settings and make necessary changes. Retry the email message see if the same error occurs, or if it was a one time problem.
Otherwise, contact the sender’s email support team or encryption provider to help identify any misconfiguration with the sender’s account or encryption tools.
4.7.6- Official definition from ITEF
For the code that starts from 4.X.X
A persistent transient failure is one in which the message as sent is valid, but persistence of some temporary condition has caused abandonment or delay of attempts to send the message. If this code accompanies a delivery failure report, sending in the future may be successful.
For the code that starts from X.7.6
A transport system otherwise authorized to validate or decrypt a message was unable to do so because the necessary algorithm was not supported.
5.7.6 Email Bounce Error
Reason
Message Encryption Issues: Message Not Delivered
The message could not be delivered because an email server involved with sending the message had difficulty processing the security features of the message.
How to fix?
If intentionally sending ecrypted email messages, check the sender’s email program settings and make necessary changes. Retry the email message see if the same error occurs, or if it was a one time problem.
Otherwise, contact the sender’s email support team or encryption provider to help identify any misconfiguration with the sender’s account or encryption tools.
5.7.6- Official definition from ITEF
For the code that starts from 5.X.X
A permanent failure is one which is not likely to be resolved by resending the message in the current form. Some change to the message or the destination must be made for successful delivery.
For the code that starts from X.7.6
A transport system otherwise authorized to validate or decrypt a message was unable to do so because the necessary algorithm was not supported.
