On Fri, 1 Oct 1999, Nir Simionovich (Rin Solo) wrote:
> Every mail that will reach the linux, will be forwarded automaticly to
> the Exchange Server on the inside, the rule willbe defined on the
> firewall of course.
i beg your pardon? what does the firewall rules got to do with forwarding
email. the real work is done using MX records and secondary mail servers.
on the real DNS, you define the linux machine as the main MX for the
domain. this way, every machine in the world will forward mail meant for
this domain, to the linux machine. the firewall only needs to enable
imcoming connections to port 25 of this mahcine - not to do any special
routing.
on this linux machine, you run a local dns server (NOT accessible from the
outside), in which you define that tihs domain has two MX records. the
first (with lower number, and hence higher priority) is the NT machien.
the second is the linux machine itself.
finally, you configure this DNS to be primary for te local domain, and to
perform forwarding for any other requests (e.g. those coming frm sendmail
when it tries to send email to the outside world).
do not forget to tell this linux's mail server that this domain is being
RELAYED, rather then being its own primary domain.
such a setup would establish more or less wht you need.
btw, you do not need to configure the mail clients on the intenal network
to access the linux server at all. they can use the NT server as their
SMTP server, provided that this one is configured to use the linux server
as its smart host (however that is configured for an exchange server is
beyond me - read the source...errrr, the docs, luke).
guy
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