In message <20051023063314.GB2366@???>, Marc
Haber <mh+exim-users@???> writes
>Spamassassin docs recommend that mail servers in transit of a message
>records the envelope sender in the Received:-Header, since some of its
>tests work more reliably if one can detect envelope sender rewrites
>during the transit chain. This will probably get more important if
>"schemes" like SRS get more common than they're now.
hmmm... there appears to be an underlying assumption here that the bad
guys will not preload the email with interesting looking Received header
fields containing misleading "envelope-sender" comments
however, I can't immediately see that it makes anything worse (except
for a small increase in overall message size)
- --
richard Richard Clayton
They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety. Benjamin Franklin
