[horde] SPam filtering

[Philippe Faure]

Hello,

I have been trying to get the regular expressions to filter emails  
that don't have valid recipients. For example emails that I would  
expect to receive would have the recipient listed as:
Philippe faure <philippe at faure.ca>
Philippe faure <phil at faure.ca>
or
<phil at faure.ca>

not:

Sam hernadez <phil at faure.ca>
Gabriel Storm <phil at faure.ca>

Has someone found a way to filter based on this requirement?  I looked  
at the regular expressions examples, and there isn't much, and I can't  
seem to get it to work properly.

This is what I have so far, but it doesn't even seem to work.

<?phil.*@faure\.ca>?

Any thoughts or suggestions would be greatly appreciated.

Philippe