@Benjamin_Ortiz1  I came across this article while trying to set up my Twilio webhook, and though it's been years since you posted, hopefully this information will help someone. To view the 2-way communication within Twilio, within Salesforce (which we are using), it was necessary to use the Messaging Service SID in the From parameter instead of the Phone Number.  Eg, From=<MessagingServiceSIDhere>&To=%2B1{{company.Mobile}}&Body={{my.SMS Message}} You can find your Messaging Services including the Messaging Service SID for each on your Messaging Services page here: https://www.twilio.com/console/sms/services   ... View more