Error 21603
Product: Programmable SMS
ERROR - 21603
A 'From' or 'MessagingServiceSid' parameter is required to send a message
Make sure to specify a valid Twilio Phone Number, Alpha Sender ID, or Messaging Service SID in your API requests The 'From' parameter in your API request to send an outbound message did not include a valid Twilio Number, Alphanumeric Sender ID, or Messaging Service SID.
You can provide any of the above sender types in your From parameter. You may also provide a Messaging Service SID using the dedicated 'MessagingServiceSid' parameter, either instead of or in addition to a specific 'From' parameter.
Possible Causes
- You did not specify a 'From' parameter in your API request
Possible Solutions
- Specify a valid Twilio Number, Alphanumeric Sender ID, or Messaging Service SID as the 'From' parameter in your API request
- Specify a valid Messaging Service SID as the 'MessagingServiceSid' parameter in your API request