Luca:
yes you can, you just have to specify two style blocks
LAYER
[...CUT...]
TYPE POLYGON # FOR FILL COLOR
CLASS
STYLE
COLOR 197 227 252
END
STYLE
SIZE 3
SYMBOL 'circle'
OUTLINECOLOR 0 0 255
END
END
END
if you're using AGG, it's even simpler
STYLE
COLOR 197 227 252
WIDTH 3
OUTLINECOLOR 0 0 255
END
cheers,
tb