21708: Alpha Sender ID Missing from the requestPositive FeedbackNegative FeedbackWARNING: 21708warning-21708 page anchorPositive FeedbackNegative FeedbackPROGRAMMABLE SMSWARNING Descriptiondescription page anchorPositive FeedbackNegative Feedback Error - 21708error---21708 page anchorPositive FeedbackNegative Feedback Alpha Sender ID Missing from the requestalpha-sender-id-missing-from-the-request page anchorPositive FeedbackNegative Feedback Possible Causespossible-causes page anchorPositive FeedbackNegative Feedback Ensure that a request contains an alphasender in it Possible Solutionspossible-solutions page anchorPositive FeedbackNegative FeedbackPlease include an alphasender in the request