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A 'From' or 'MessagingServiceSid' parameter is required to send a message

ERROR: 21603

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The 'From' parameter in your API request to send an outbound message did not include a valid Twilio Number, Alphanumeric Sender ID(link takes you to an external page), or Messaging Service SID(link takes you to an external page).

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

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  • You did not specify a 'From' parameter in your API request

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