[Mimedefang] Stripping received lines

[Kenneth Porter]

I've got a colo'd server in Cogent address space that can't send mail to 
members at Road Runner addresses, presumably due to the Cogent black list. 
In the past I've successfully bounced the mail off my office server using 
mailertable entries but RR now recognizes the original source. I'm guessing 
that it now rejects mail with any Received lines in Cogent space, so I'd 
like to strip those before forwarding them on. Does anyone have code to 
strip such lines? Or can you suggest a better solution?