Incidentally, I wouldnt let the firewall actually function as an MTA - I
would set up the firewall to allow outbound port 25 from the exim box -
you get much better control over the queue of messages waiting to be
deleivered that way. Also, most 'firewall' smtp servers just suck in
terms of usability and RFC compliance. For inbound mail, again, forward
port 25 from outside to the exim machine. You get the ability to verify
addresses at SMTP-time (and reject mail to nonexistant accounts), plus
its one less thing to troubleshoot when something goes wrong. If you set
it up so that the 'firewall' accepts the message and stores it, and then
transmits it to the exim box, then it may well be accepting al sorts of
junk and spam that the eximbox could otherwise reject out of hand..
On Thu, 9 Aug 2001, lee engel wrote:
> %First, get & read:
> % <http://www.globnix.org/mail-intro.txt>
> %
> %It's terse, but it explains the main stuff.
> %
> %Next: sendmail and sendmail.cf shouldn't come into play at all. The
> %whole point is that you're replacing sendmail with Exim. Since you're
> %using FreeBSD 4.x, you should change /etc/mail/mailer.conf so that it
> %refers to exim for "sendmail", "send-mail", "mailq" & "newaliases", and
> %the others should be /usr/bin/true or something. You might also want to
> %remove setuid from /usr/libexec/sendmail/sendmail and add
> % NO_SENDMAIL= true
> %to /etc/make.conf
>
> Thanks. I did not know about that.
>
> %
> %At the absolute bare minimum, read section 3 of that document. It will
> %explain the concepts, teach you what's what. It will tell you what a
> %"Router" is how they're used, and at this point you'll start
> %understanding how you'd go about making all external mail goes to one
> %box. Especially if you then look-up what a "domainlist" router is.
> %
> %Ideally, read much more of the Exim Spec. But the most important
> %sections for you are probably 3, 6..9, 11 (skim), 40 (explains the
> %defaults), 46 (expecially 46.4, explains relaying controls), 51
> %(explains the log-files, so you can figure out what's going on) and 52
> %("Day-to-day management", says it all). By this time, you'll understand
> %what's going on and what fits where.
> %
> Thanks so much, this really helps.
>
> %Alternatively, if you like O'Reilly books (which all good sysadmin do --
> %they explain the topic without teaching you, eg, how to use a
> %text-editor (unless it's a book _on_ the text-editor)) then try their
> %Exim book. It's written by Philip Hazel, the author of Exim, and
> %everyone I know who's read it, really likes it (I've only had time to
> %skim).
>
> Way ahead of you on this one :) Its on order, should be arriving in the
> next couple of days.
>
> Thanks again.
>
> Regards,
> Lee Engel
>
> Systems
> UUNET SA, a WorldCom Company
> (o) +27.21.658.8571
> (f) +27.21.658.8552
> (m) +27.82.389.5004
> http://www.uunet.co.za or 08600 88638
> Documentation is the castor oil of programming. Managers know it must
> be good because the programmers hate it so much.
>
>
> --
> ## List details at http://www.exim.org/mailman/listinfo/exim-users Exim details at http://www.exim.org/ ##
>
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