[Zope] How to skip validation when uploading

[Jonas Nielsen]

I would like to upload some regular html files using ftp port
8021. However if the files are not valid html it simply won't upload
them, and it put an error message in the log (not containing the line
number of the error). If I make a new document in zope (plone), and
copy and paste the same code in it, zope is much more liberal about
the code.

Is it possible to remove the check when uploading ?