4.1.5 Email Bounce Error
Reason
Valid Email Address: Delayed Message
The email message has not yet been delivered even though the recipient’s email address is a valid email address.
How to fix?
If the email address you’re using is correct and your recipient can receive emails to their inbox, then you could contact the email provider for help.
4.1.5 – 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.1.5
This mailbox address as specified was valid. This status code should be used for positive delivery reports.
5.1.5 Email Bounce Error
Reason
Valid Email Address: Message Not Delivered
The message could not be delivered even though the recipient’s email address is a valid email address.
How to fix?
If the email address you’re using is correct and your recipient can receive emails to their inbox, then you could contact the email provider for help.
5.1.5 – 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.1.5
This mailbox address as specified was valid. This status code should be used for positive delivery reports.
