WFS using xml

[Ricaille Tanguy]

Hello,
is it possible to get a feature description using POST with a xml file like
this:
<wfs:GetFeature service="WFS" version="1.0.0" outputFormat="GML2"...
xmlns=...
    <wfs:Query typeName="featurename">
        <ogc:Filter>
            <ogc:BBOX>
                <ogc:PropertyName>....
                ...
</wfs:GetFeature>
Can i post it to http://localhost:8089/cgi-bin/mapserv, and get back
description file in gml ?

I have a like application using geoserver, and i will try to use
mapserver... I hope it is possible.
Thank you.