Mailbox status indicates that something having to do with the mailbox has caused this DSN. Mailbox issues are assumed to be under the general control of the recipient.
- x.2.0
- Other or undefined mailbox status
- x.2.1
- Mailbox disabled, not accepting messages
- x.2.2
- Mailbox full
- x.2.3
- Message length exceeds administrative limit
- x.2.4
- Mailing list expansion problem