Code,Summary,Description,Reference,Submitter,Change Controller
2.XXX.YYY,Success,"Success specifies that the DSN is reporting a
positive delivery action.  Detail sub-codes may
provide notification of transformations required for
delivery.",[RFC3463] (Standards track),G. Vaudreuil,IESG
4.XXX.YYY,Persistent Transient Failure,"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.",[RFC3463] (Standards track),G. Vaudreuil,IESG
5.XXX.YYY,Permanent Failure,"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.",[RFC3463] (Standards track),G. Vaudreuil,IESG