5.2.2 Mailbox full
Permanent: retrying will not helpThe recipient’s mailbox has no more space. This is the permanent form (4.2.2 is the temporary one), though some servers use it for a mailbox that is only full for now.
- The mailbox is over its storage limit.
- Retry in a day or two. If it keeps failing, the person has to clear space.
- If the same address is full for weeks, stop sending to it.
Usually the fault of: recipient.