Re: Origins of message modification

> Didn't address fields need to be modified by email gateways in the 
> eighties?
yes.  there's a reason sendmail has the extensive address rewriting 
facilities that it does - it was written at a time when it was useful 
to try to cope with lots of relatively simple messaging systems each of 
which had its own addressing conventions.  but I was talking about 
ARPAnet/Internet mail architecture, not about gateways between mail 
systems.
gateways have to rewrite things regardless.  we just don't see this as 
much today because Internet mail has been selected (in the Darwanian 
sense) over other mail systems.