How can I manage the Twilio SMS subscription settings?

Sending all SMS messages through Twilio will allow you to customize the the sending phone number and possibly support STOP, BLOCK, and CANCEL responses in accordance with industry standards within Twilio's settings.

Note: Since Mixpanel does not support SMS STOP filtering, the users will not show as unsubscribed in your Mixpanel project, so they will still be eligible for SMS targeting. However, since the messages are sent through Twilio, if they have enabled STOP, BLOCK, and CANCEL filtering with one of the Twilio supported standard English languages replies, they will not receive the SMS message.