msilo/m_dump includes in front of dumped message a string, such as
[Offline message - Mon Oct 5 14:20:38 2009] hello
this is ok, if content type of body is text/plain, but not ok, if
content type is, for example, text/xml.
in my opinion this should be fixed, for example, by calling
m_build_body only of content type is text/plain.
-- juha