Re: Protecting an Exchange server?

[Ed Budd <ebudd () grokking org>]

On Thu, 20 May 2004 06:57:38 -0700
"Randy Johnson" <randyj () holydiver com> wrote:

> I'm greatly interested in this thread, and have a couple questions for
> the group.
>
> I am currently needing to try to do this with Sendmail (in the long
> term I plan to migrate to Postfix, but for now it's gotta be
> Sendmail).
>
> In the past, I've done this with the 'SmartHost' directive (as someone
> had alluded to in the previous thread) but now it appears that isn't
> the'correct' way, and I should use the 'Mailers' table ?


I've done this with FreeBSD 5.1 running Sendmail 8.12.9 and Exchange
2000:

1. Add the relevant domain(s) to the local-host-names file so sendmail
recognizes the mail recipients as local and not an attempt at
third-party relay;

2. Add entries for each domain name you need to mailertable
like so (the square brackets are necessary in the latter case)

        @domainname     esmtp:exchange.hostname
                                OR
        @domainname     esmtp:[ipaddress.of.exchange.server]

Do the standard make maps, restart sendmail routine relevant to your
platform and version.

Then make the sendmail relay the 'smarthost' in the smtp virtual host
settings on exchange and add the exchange server to the
the access file so sendmail accepts relaying for it. If you use
SMTP AUTH on the sendmail relay you'll need to set this up through the
use of an smtp connector. I've used a special user account for this
purpose.

Then do the standard make maps, restart sendmail routine relevant to
your platform and version.

Hope that helps,

EB

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