Skip n envelope

Hi !

        May I have an question ?

        I know envelope and qvitual. But If my ISP add one more envelope line ? 
for example :

        Delivered-To: mydomain(_dot_)com%postmaster(_at_)mydomain(_dot_)com
        Received: .......
        Delivered-To: 
mydomain(_dot_)com%firstname(_dot_)lastname(_at_)mydomain(_dot_)com
        Received: .......

        The second "Delivered-To:" was correctly address. How can I asking 
fetchmail skip the first "Delivered-To:" line and using second "Delivered-To:" 
line ?
        I am using fetchmail 5.6.0 now. (Sorry, I can't make 5.6.2 succeed). I 
can't find the keyword/switch for skip something. Or should I looking into 
source ?

        Thanks your help.