DND Service
This document provides an overview of Plivo’s DND feature for the US long codes and toll-free numbers. For US shortcodes, customers are expected to manage opt-out blocklists on their end. Learn more about managing opt-in for shortcodes here.
For Longcode Numbers
Plivo’s DND feature will stop outbound messages from a specific Plivo number (SRC) to a specific number (DST) when the DST responds with keywords starting with STOP. For example, if Number A sends an inbound message with any of the keywords listed below to Plivo Number B, then any outbound messages from Number B to Number A will be blocked for a period of three months.
Keywords to opt-out
- STOP
- END,
- QUIT,
- CANCEL,
- UNSUBSCRIBE,
- UNSUB &
- STOP ALL
HELP/INFO Keywords
Plivo sends automatic messages to end-users who send HELP/INFO keywords in the inbound message. These automated messages read:
"Text "STOP" to stop receiving any messages from this number. Text "START" to start receiving messages again
from this number."
OPT-IN Feature
To opt back in to receive messages from a blocked number (SRC- Plivo DID), the number which has replied with STOP must send one of the following keywords.
Keywords to opt-in
- START,
- YES,
- RESUME,
- RESUME ALL,
- UNSTOP, &
- GO
Once the number replies with any of the above keywords, it can receive SMS from the Plivo number which was blocked.
For Toll-Free Numbers
Keywords to opt-out
- “STOP”
- “Stop”
- “stop”
- “STop”
Invalid opt-out examples
- “Hey, can you stop texting me?”
- “Stop it!”
The opt-out confirmation message returned to a consumer is generic and provides instructions on how to opt back into service again with the message sender’s phone number.
Opt-out confirmation message
The network message reads as follows:
“You replied with the word "STOP" which blocks all texts sent from this number. Text back "UNSTOP" to receive
messages again.”
Opt-In Key Words & Messages
A consumer can opt back in at any time to receive messages by texting the keyword “UNSTOP” to a message sender’s phone number. The keyword is not case sensitive and triggers opt-in only when sent as a single word with no punctuation or leading spaces (any trailing spaces are trimmed). If the consumer uses the opt-in keyword within a sentence, the opt-in is not triggered.
Keywords to opt-in
- “UNSTOP”
- “Unstop”
- “unstop”
- “UNStop”
Invalid opt-in examples
- “Hey can you enable me again”
- “Unstop me!”
The message returned to a consumer is generic and informs the consumer they can start two-way texting with the message sender’s phone number again.
Message text
The network message reads as follows:
“You have replied "unstop" and will begin receiving messages again from this number.”