WordPress does not publish content, if blogging via e-mail

Hi,
I have a problem: when posting by e-mail, and calling wp-mail.php from the browser, just the post title is published, and no content is displayed. That is: clicking on the post title, it just shows the author and date, without any content, and there is also no excerpt at all
This is the result of pointing browser on wp-mail.php in my wordpress directory:
just an explanation: “ciao, bau, miao” and “prova invio e-mail” are the titles of the post.

***
Author = [email protected]

Content-type: text/plain, Content-Transfer-Encoding: , boundary:

Raw content:

Author: 1

Posted title: prova invio e-mail.
Posted content:

Mission complete, message 1 deleted.

Author = [email protected]

Content-type: text/plain, Content-Transfer-Encoding: , boundary:

Raw content:

Author: 1

Posted title: ciao, bau, miao
Posted content:

Mission complete, message 2 deleted.
***
I have no wp-mail.php modification on it, I am using just the official version. Without any theme and plugin modification
Except for, of course, the options change, that is blog name, blog URL, and pop3 settings.
On the post writing I just changed the editor, using the normal one instead of the advanced one. as I am blind and find the wysiwyg quite nasty.
I’d like to use the “blog by email” feature as it’s much much easier
thanks a lot