User's GuideGetting StartedBounce Message Translations

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