Non-Delivery Report (NDR) / Bounce Codes (Email)
From ben.goodacre.name/tech
| First digit: |
| 2.x.x successful transfer |
| 4.x.x persistent failure |
| 5.x.x permanent failure |
| Second and Third digits: |
| x.1.0 other address status |
| x.1.1 bad destination mailbox address Example: 5.1.1 Bounce when Sending Meeting Request (Outlook) |
| x.1.2 bad destination system address |
| x.1.3 bad destination mailbox address syntax |
| x.1.4 destination mailbox address ambiguous |
| x.1.5 destination mailbox address valid |
| x.1.6 mailbox has moved |
| x.1.7 bad sender’s address syntax |
| x.1.8 bad sender’s system address |
| x.2.0 other or undefined mailbox status |
| x.2.1 mailbox disabled, not accepting messages. See: Bounce 5.2.1 when emailing a public folder (Exchange) |
| x.2.2 mailbox full |
| x.2.3 message length exceeds administrative limit |
| x.2.4 mailing list expansion problem |
| x.3.0 other or undefined mail system status |
| x.3.1 mail system full |
| x.3.2 system not accepting network messages |
| x.3.3 system not capable of selected features |
| x.3.4 message too big for system |
| x.4.0 other or undefined network or routing status |
| x.4.1 no answer from host |
| x.4.2 bad connection |
| x.4.3 routing server failure |
| x.4.4 unable to route |
| x.4.5 network congestion |
| x.4.6 routing loop detected |
| x.4.7 delivery time expired |
| x.5.0 other or undefined protocol status |
| x.5.1 invalid command |
| x.5.2 syntax error |
| x.5.3 too many recipients |
| x.5.4 invalid command arguments |
| x.5.5 wrong protocol version |
| x.6.0 other or undefined media error |
| x.6.1 media not supported |
| x.6.2 conversion required and prohibited |
| x.6.3 conversion required but not supported |
| x.6.4 conversion with loss performed |
| x.6.5 conversion failed |
| x.7.0 other or undefined protocol status |
| x.7.1 delivery not authorized, message refused |
| x.7.2 mailing list expansion prohibited |
| x.7.3 security conversion required but not possible |
| x.7.4 security feature not supported |
| x.7.5 cryptographic failure |
| x.7.6 cryptographic algorithm not supported |
| x.7.7 message integrity failure |
See Also
Delivery status notifications in Exchange Server and in Small Business Server (Microsoft Support)
Exchange NDR Codes
