4.5.3 Email Bounce Error
Reason
Too Many Recipients For Message: Delayed Message
The email message has not yet been delivered because it was addressed to more recipients than the email systems involved could handle.
How to fix?
Divide the list of recipients into two groups and send the email message each group separately. If this problem still occurs, divide your list further, e.g. into four, six, or more groups.
4.5.3- 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.5.3
More recipients were specified for the message than could have been delivered by the protocol. This error should normally result in the segmentation of the message into two, the remainder of the recipients to be delivered on a subsequent delivery attempt. It is included in this list in the event that such segmentation is not possible.
5.5.3 Email Bounce Error
Reason
Too Many Recipients For Message: Message Not Delivered
The message could not be delivered because it was addressed to more recipients than the email systems involved could handle
How to fix?
Divide the list of recipients into two groups and send the email message each group separately If this problem still occurs, divide your list further, e.g. into four, six, or more groups.
5.5.3- 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.5.3
More recipients were specified for the message than could have been delivered by the protocol. This error should normally result in the segmentation of the message into two, the remainder of the recipients to be delivered on a subsequent delivery attempt. It is included in this list in the event that such segmentation is not possible.
