My Mapfile:
#
# Start of map file
#
#
MAP
  CONFIG "MS_ERRORFILE" "ms_error.txt"
  CONFIG "CPL_DEBUG" "ON"
  DEBUG 5
  NAME "SEGIS"
  STATUS ON
  SIZE 800 600
  SYMBOLSET "../../etc/symbols.txt"
  EXTENT -170 10 175 75
  UNITS DD
  IMAGECOLOR 0 0 0
  FONTSET "../../etc/fonts.txt"
  #
  # Start of web interface definition
  #
  WEB
   IMAGEPATH "/ms4w/tmp/ms_tmp/"
   IMAGEURL "/ms_tmp/"
   TEMPLATE "../htdocs/segis-demo-template.html"
   METADATA
     "wms_title" "WMS"
     "wms_onlineresource" "http://localhost/cgi-bin/mapserv.exe?map=wms.map&?"
     "wms_srs" "EPSG:4326"
     "wms_enable_request" "*"
     "ows_enable_request"   "*"
     "wms_feature_info_mime_type" "text/html"
     "wms_format" "image/png"
     "wms_rootlayer_name"  ""
   END # Metadata
  END # Web
  ##
  ## Output projection
  ##
  PROJECTION
    "init=epsg:4326"
  END # Projection
  SYMBOL
    NAME "circle"
    TYPE ellipse
    POINTS 1 1 END
  END # Symbol
  #
  # Start of layer definitions
  #
  LAYER
    DEBUG 5
NAME "Installations"
METADATA
 "wms_title" "Installations"
 "wms_srs" "EPSG:4326"
 "wms_enable_request" "*"
      "ows_enable_request" "*"
      "wms_feature_info_mime_type" "text/html"
      "wms_format" "image/png"
END # Metadata
TYPE POINT
STATUS ON
CONNECTIONTYPE POSTGIS
CONNECTION "host=localhost dbname=postgis user=XXXXXXXX password=XXXXX port=5432"
    DATA "wkb_geometry from fy19_mirta_points using srid=4326"
PROCESSING "CLOSE_CONNECTION=DEFER"
    PROJECTION
      "init=epsg:4326"
    END # Projection
# TEMPLATE
CLASS
      NAME "Installations"
 STYLE
        SYMBOL "circle"
        SIZE 8
        COLOR 0 0 0
      END # Style
END # Class
  END # Layer
  LAYER
    DEBUG 5
NAME "InstallationBoundaries"
METADATA
 "wms_title" "InstallationBoundaries"
 "wms_srs" "EPSG:4326"
 "wms_enable_request" "*"
      "ows_enable_request" "*"
      "wms_feature_info_mime_type" "text/html"
      "wms_format" "image/png"
END # Metadata
TYPE POLYGON
STATUS ON
CONNECTIONTYPE POSTGIS
CONNECTION "host=localhost dbname=postgis user=XXXXXXXX password=XXXXX port=5432"
DATA "wkb_geometry from public.fy19_mirta_boundaries using srid=4326 using unique ogc_fid"
    PROJECTION
      "init=epsg:4326"
    END # Projection
CLASS
NAME "InstallationBoundaries"
     STYLE
   COLOR 232 232 232
OUTLINECOLOR 120 120 120
 END # Style
END # Class
  END # Layer
END # Map File