I have forward e-mail option activated in order to get a copy of all received e-mail  to be delivered to another e-mail account.   

I also use my windows phone to send and receive e-mail from my account. 

The problem seems to occur with some of the e-mails that are delivered to my phone and read by me. These are received at the forward to adress. 

What can I do? 

thanks

P.