🚀 go-pugleaf

In article <208@frcs.UUCP> paul@frcs.UUCP (Paul Nash) writes:
>
>We have a dispute between the administrators of a few local machines.
>One of the machines runs `sendmail' (for bizzare reasons), and has
>a `sendmail.cf' file that re-writes the `To:' and `From:' fields in
>all forwarded mail.
>
>The effect on the headers is roughly as follows (`gatebox' is the
>[ficticious] `sendmail' pervert):
>
>	incoming			outgoing
>	
>	To: user@toaster		To: toaster!user@gatebox
>	From: me@tinytoy		From: tinytoy!me@gatebox
>

  In an ideal world, the To: and 'From:' headers would not be rewritten.
But in this ideal world only valid addresses would be used, so that
rewriting is not required.  If your world creates addresses such as
'user@toaster' or 'me@tinytoy', then your world is far from ideal, and
the rewriting by sendmail is only rescuing you from a worse fate.

  A well designed 'sendmail.cf' will try to make sure that all addresses
are valid.  If they are not valid, it will try to add routing to make sure
there is a valid internet address on the outgoing mail.  If the incoming
address is already valid it is normally rewritten to its incoming form.

  If you send me mail with a 'From:' address of 'me@tinytoy', and I find
that my attempt to reply results in bounced mail and considerable annoyance,
you and your postmaster are both going to get a strong message from me
complaining about your broken mailers.

-- 
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  Neil W. Rickert, Computer Science               <rickert@cs.niu.edu>
  Northern Illinois Univ.
  DeKalb, IL 60115.                                  +1-815-753-6940