5

Message not delivered at third party

The message has been confirmed as undelivered but no detailed information related to the failure is known.

7

Message not delivered at operator because recipient has insufficient credit

Temporary - Used to indicate to the client that the message has not yet been delivered due to insufficient subscriber credit but is being retried within the network.

8

Message expired at third party

Temporary - Used when a message expired (could not be delivered within the life time of the message) within the operator SMSC but is not associated with a reason for failure.

20

Message not delivered because of a malformed request

Used when a message in its current form is undeliverable.

21

Message expired at operator

Temporary - Only occurs where the operator accepts the message before performing the subscriber credit check. If there is insufficient credit then the operator will retry the message until the subscriber tops up or the message expires. If the message expires and the last failure reason is related to credit then this error code will be used.

22

Message not delivered at operator because recipient has insufficient credit

Temporary - Only occurs where the operator performs the subscriber credit check before accepting the message and rejects messages if there are insufficient funds available.

23

Message not delivered because of an incorrect recipient number (invalid/blacklisted/barred)

Used when the message is undeliverable due to an incorrect / invalid / blacklisted / permanently barred Phone Number for this operator. This Phone Number should not be used again for message submissions to this operator.

24

Message not delivered because the recipient was unreachable

Temporary - Used when a message is undeliverable because the subscriber is temporarily absent, e.g. his/her phone is switch off, he/she cannot be located on the network.

25

Message not delivered at third party

Temporary - Used when the message has failed due to a temporary condition in the operator network. This could be related to the SS7 layer, SMSC or gateway.

26

Message not delivered because of a temporary handset issue (sim card full/memory exceeded/SME busy)

Temporary - Used when a message has failed due to a temporary phone related error, e.g. SIM card full, SME busy, memory exceeded etc. This does not mean the phone is unable to receive this type of message/content (refer to error code 27).

27

Message not delivered because of a permanent handset issue (unable to receive SMS)

Permanent - Used when a handset is permanently incompatible or unable to receive this type of message.

28

Message not delivered because submission speed is too high (throttling errors)

Used if a message fails or is rejected due to suspicion of SPAM on the operator network. This could indicate in some geographies that the operator has no record of the mandatory MO required for an MT.

29

Message not delivered because content is not permitted

Permanent - Used when this specific content is not permitted on the network / shortcode.

30

Message not delivered because the set spend limit is reached

Temporary - Used when message fails or is rejected because the subscriber has reached the predetermined spend limit for the current billing period.

31

Message not delivered because the recipient was suspended from premium services

Used when the Phone Number is for a valid subscriber on the operator but the message fails or is rejected because the subscriber is unable to be billed, e.g. the subscriber account is suspended (either voluntarily or involuntarily), the subscriber is not enabled for bill-tophone services, the subscriber is not eligible for bill-to-phone services, etc.

33

Message not delivered because of parental lock

Used when the subscriber cannot receive adult content because of a parental lock.

34

Message not delivered because age check failure

Permanent - Used when the subscriber cannot receive adult content because they have previously failed the age verification process.

35

Message not delivered because age check missing

Temporary - Used when the subscriber cannot receive adult content because they have not previously completed age verification.

36

Message not delivered because age check unavailable

Temporary - Used when the subscriber cannot receive adult content because a temporary communication error prevents their status being verified on the age verification platform.

37

Message not delivered because recipient is in national Do-Not-Call Register (for example, the Dutch SMS DienstenFilter and Chinese DnD list)

The Phone Number is on the national blacklist

38

Message not delivered because maximum concatenation tariff exceeded

Used when the total tariff of a concatenated message exceeds the maximum tariff per message set by the operator

39

Message not delivered because quota is empty

Used when a customer is out of qouta.

40

Message not delivered because the conversation window is closed

Message failed to send, conversation window closed. The channel specific conversation window is no longer open to send messages towards this customer.

41

Message not delivered because too many messages were sent from this number

Too many messages send from this number, blocked notifications or marked as spam.

42

Message not delivered because recipient is not capable to receive a message from this channel

Used when a recipient is not capable to receive a message from this channel. (For example, the user did not install WhatsApp).

43

Message not delivered because a template related error occured

Template name does not exist for this language and namespace.