The following is a list of codes that are sometimes associated with an
Exchange Server non-delivery report (NDR). The codes are broken down into
two categories: Reason Codes, and Diagnostic Codes, which are sometimes
associated with NDR from the message transfer agent (MTA).
| 0 |
unrecognized-OR-name |
| 1 |
ambiguous-OR-name |
| 2 |
MTS-congestion |
| 3 |
loop-detected |
| 4 |
recipient-unavailable |
| 5 |
maximum-time-expired |
| 6 |
encoded-information-types-unsupported |
| 7 |
content-too-long |
| 8 |
conversion-impractical |
| 9 |
implicit-conversion-prohibited |
| 10 |
implicit-conversion-not-subscribed |
| 11 |
invalid-arguments |
| 12 |
content-syntax-error |
| 13 |
size-constraint-violation |
| 14 |
protocol-violation |
| 15 |
content-type-not-supported |
| 16 |
too-many-recipients |
| 17 |
no-bilateral-agreement |
| 18 |
unsupported-critical-function |
| 19 |
conversion-with-loss-prohibited |
| 20 |
line-too-long |
| 21 |
page-split |
| 22 |
pictorial-symbol-loss |
| 23 |
punctuation-symbol-loss |
| 24 |
alphabetic-character-loss |
| 25 |
multiple-information-loss |
| 26 |
recipient-reassignment-prohibited |
| 27 |
redirection-loop-detected |
| 28 |
DL-expansion-prohibited |
| 29 |
no-DL-submit-permission |
| 30 |
DL-expansion-failure |
| 31 |
physical-rendition-attributes-not-supported |
| 32 |
undeliverable-mail-physical-delivery-address-incorrect |
| 33 |
undeliverable-mail-phys-deliv-office-incorrect/invalid |
| 34 |
undeliverable-mail-physical-delivery-address-incomplet |
| 35 |
undeliverable-mail-recipient-unknown |
| 36 |
undeliverable-mail-recipient-deceased |
| 37 |
undeliverable-mail-organization-expired |
| 38 |
undeliverable-mail-recipient-refused-to-accept |
| 39 |
undeliverable-mail-recipient-did-not-claim |
| 40 |
undeliverable-mail-recipient-changed-addr-permanently |
| 41 |
undeliverable-mail-recipient-changed-addr-temporarily |
| 42 |
undeliverable-mail-recipient-changed-temporary-address |
| 43 |
undeliverable-mail-new-address-unknown |
| 44 |
undeliverable-mail-recipient-did-not-want-forwarding |
| 45 |
undeliverable-mail-originator-prohibited-forwarding |
| 46 |
secure-messaging-error |
| 47 |
unable-to-downgrade |