USE_HEADER_PRIORITY

(0 or 1) This option controls handling of RFC 822 Priority: header lines. By default, information from the Priority: header line is used to set the resulting SMS message’s priority flag, overriding the default SMS priority specified with the DEFAULT_PRIORITY option. This case corresponds to USE_HEADER_PRIORITY=1. To disable use of the RFC 822 Priority: header line, specify USE_HEADER_PRIORITY=0.

See the description of the DEFAULT_PRIORITY option for further information on the handling the SMS priority flag.