Bounce Message Translations
The table below provides additional information regarding if a retry is attempted and the corresponding SMTP code for the bounce message provided in the platform.
Retry | Bounce Description | SMTP Codes |
---|---|---|
Yes | Temporary failure (soft bounce) |
400-499 excluding 432 & 447 |
No | Accepted but returned, no reason given |
2xx then 5xx (out of band) |
No |
Destination system refusing retry attempts |
432 |
No |
Bad destination address |
501, 511, 512 |
No |
Bad destination address syntax |
513 |
No |
Destination mailbox ambiguous |
514 |
No |
Destination mailbox moved |
516 |
No |
Destination mailbox disabled |
521 |
No |
Message length exceeds administrative limit |
523 |
No |
Destination had error when forwarding |
524 |
No |
Undefined destination system problem |
530 |
No |
Destination mail system full |
531 |
No |
Destination system not accepting messages (possible spam block) |
532 |
No |
Destination system not capable of feature |
533 |
No |
Message too large for destination system |
534 |
No |
Destination configuration error (possible spam filter) |
535 |
No |
Undefined network or routing issue |
540 |
No |
No answer from destination system |
541 |
No |
Bad connection to destination system |
542 |
No |
Directory server failure |
543 |
No |
Unable to route to final destination |
544 |
No |
Mail system congestion |
545 |
No |
Routing loop detected |
546 |
No |
Destination mailbox unavailable (possible spam filter) |
550 |
No |
Destination mailbox unavailable (address has changed) |
551 |
No |
Relaying denied (possible block) |
553 |
No |
Delivery transaction failed |
554 |
No |
Problem processing message content |
560-569 |
No |
Delivery not authorized (probable spam filter) |
570-579 |
No |
Undefined destination mailbox error |
510, 520 |
No |
Destination mailbox full |
522, 552 |
No |
Retry time expired on temporary failure |
447, 547 |