[exim] Wrong Date in Header

Hello,

for some minutes I had an accident (I deletet it) with a perl script
which correct the "Date:" header if someone sends a messages from 1970
or 2030...

So my question is, does anyone have such script?

Please note:    I can not use the "From" header of the "Received:"
                header from the mailbox of my ISP, because I need
                the send date of the original message.

And, the script should only correct the date it there is a specified
differenc (like 7 days) between the current UTC time and the "Date:"
header.

Thanks
    Michelle

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