I agree with Dave's changes, except that you need to sign Content-Type: if
you use l=. Otherwise it's trivial to replace the entire visible contents
of the message by changing the MIME section separator, and adding new
stuff at the end.
Regards,
John Levine, johnl(_at_)iecc(_dot_)com, Primary Perpetrator of "The Internet
for Dummies",
Please consider the environment before reading this e-mail. http://jl.ly
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