Plivo provides a “do not disturb” (DND) feature for the US long codes and toll-free numbers. For US short codes, customers can manage opt-ins and opt-outs on their own.
Plivo sends automatic messages to users who send HELP or INFO keywords to a Plivo long code or toll-free number.
Text STOP to stop receiving messages from this number. Message and data rates may apply.
Plivo’s DND feature stops outbound messages from a specific Plivo source number (long codes and toll-free only) to a specific destination number when the destination responds with certain keywords. 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 with error code 200.
All of the keywords are case-insensitive, so variations like STOP, Stop, STop, and stop are all valid.
An opt-out confirmation message tells the customer that they have been unsubscribed and will not receive any message from the same source number.
You have been unsubscribed and will not receive any more messages from this number.
To opt back in to receive messages from a blocked number, the number that replied with STOP must send one of these keywords:
After a number replies with any of these keywords, it will again be able to receive messages from the Plivo number that was blocked. The keyword triggers opt-in only when sent as a single word with no punctuation or leading spaces (any trailing spaces are trimmed).
All the keywords are case-insensitive, so variations like UNSTOP, UNStop, UnSTop, and unstop are all valid.
An opt-in confirmation message informs the consumer they can start two-way texting with the message sender’s phone number again:
You have been resubscribed to receiving messages from this number. Reply HELP for help or STOP to stop receiving messages. Message and data rates may apply.
If a sender’s phone number was not blocked earlier, sending these keywords will not trigger any confirmation message.