Use sms privacy Option

By default, SMS privacy indications are ignored and not sent with the e-mail messages. To have this information passed with the e-mail in a Sensitivity: header line, specify a value of 1 for the  SMS   option. When passed along in e-mail, the mapping from SMS to a Sensitivity: header line is as shown in Table of Privacy Flag Mappings from SMS to E-Mail,

Note that the values of the e-mail Sensitivity: header line are Personal, Private, and Company-confidential.

The default value is: 0

See also:
 * SMS gateway_profile options