Tmail talk - Jan 2009 - Obtaining raw header text for "illegal" headers

Hi,

I got an email with this From: header:

 >> mail[''From'']
=> #<TMail::AddressHeader "xxyy at xxyy.zz<xxyy at
xxyy.zz>\r\n">
 >> mail.from
=> nil

Now, I would like to read the "xxyy at xxyy.zz<xxyy at
xxyy.zz>\r\n" value,
but how do I do this?

 >> mail[''From''].body
=> ""

Is it not possible to access the raw header data if the header is  
illegal?

 >> mail[''From''].illegal?
=> true

Thanks,

Morten