Using Twilio Can't contact my paid subscribers "From/To pair violates a blacklist rule."

Question

I was sending out Phone calls to my subscribers (who pay for this information) via Twilio with PHP with no problem, but now I am getting a fatal error

"The message From/To pair violates a blacklist rule."

Below is the error message. Any ideas as to what I can do?

[19-Feb-2014 07:36:06 UTC] PHP Fatal error:  Uncaught exception 'Services_Twilio_RestException' with message 'The message From/To pair violates a blacklist rule.' in /Services/Twilio.php:293

Stack trace:

#0 /twilio-php-latest/Services/Twilio.php(217): Services_Twilio->_processResponse(Array)
#1 /Services/Twilio/ListResource.php(92): Services_Twilio->createData('/2010-04-01/Acc...', Array)
#2 /Services/Twilio/Rest/Messages.php(24): Services_Twilio_ListResource->_create(Array)
#3 /Services/Twilio/Rest/Messages.php(71): Services_Twilio_Rest_Messages->create(Array)
#4 /alerts_text_wakeup.php(532): Services_Twilio_Rest_Messages->sendMessage('1XXXXXXXXXX', '1XXXXXXXXXX', 'XXXXXXXXXXXXXX')
#5 {main}
thrown in /Services/Twilio.php on line 293

Answer 1

Twilio Evangelist here,

It sounds a lot like one of your subscribers has sent you an SMS containing 'STOP' as detailed by Error 21610. Check your SMS logs for SMS from the person you are trying to send to, as they may have opted out of your service. Twilio will have noticed this, and will prevent you form contacting that person again.

If you cannot find any messages like this, I would suggest you contact [email protected] with your Account SID and the To/From pair. They can check this out for you.

Because customers can opt out, I would generally advise people to handle this sort of error gracefully.

Hope this helps!