Stephen.Dawes at GOV.CALGARY.AB.CA
Wed Nov 20 19:06:40 GMT 2002
Thanks, you have given me some ideas as to what I am doing wrong in my approach.
So I am going to undo some of what I have already done and attack the problem with your approach.
I am looking to getting all up and running, and when I do so, I will drop you a line as to the final outcome. (off line if you prefer)
I do appreciate the need to stay on topic, so no offence taken by your response.
Stephen Dawes <B.A., B.Sc.>
The City of Calgary | Phone: (403) 268-5527
Web Business Office #8300 | Fax: (403) 268-6423
PO Box 2100 Postal Station M. | Email: Stephen.Dawes at calgary.ca
Calgary, Alberta, Canada. T2P 2M5 | Web: http://www.calgary.ca
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> -----Original Message-----
> From: Julian Field [mailto:mailscanner at ECS.SOTON.AC.UK]
> Sent: 2002 November 20 11:48 AM
> To: MAILSCANNER at JISCMAIL.AC.UK
> Subject: Re: Sendmail configuration:
> I don't quite see why you need to run MailScanner on a
> different box from
> your mail server, if you are using sendmail or Exim on the
> mail server. It
> just adds extra complication and really doesn't gain you very much.
> You need to set up your mail server to accept mail from your
> box, and you need to set up your MailScanner box so that it
> receives mail
> from the outside world and relays it onto the mail server for you.
> You should do *all* of that before you think about installing
> Test it.
> Make sure it all works.
> Only once you are happy that the mail is going to and from the right
> places, with all the right addresses and headers, should you install
> MailScanner on the box that faces the outside world.
> MailScanner does not get involved with the SMTP service, nor
> the delivery
> or addressing of any email that passes through it.
> So installing MailScanner won't affect the path that mail
> takes through
> your systems, which is why you should get them all working first.
> You might want to ask this list if there is someone who could
> help you set up your mail system the way you want it, but
> otherwise that is
> OT (off-topic) for this list. Get back to us when you install
> itself. I'm not being rude or anything, I hope you won't take
> offence, none
> is intended. But I do like to keep this list reasonably "on
> topic" and
> general mail setup information discussions aren't really relevant to
> MailScanner itself.
> At 17:19 20/11/2002, you wrote:
> >New to MailScanner, I have a few questions about configuring
> sendmail to
> >work the way that I would like it too. However, before I ask the
> >questions, I would like to let you know that I think that I
> have done my
> >homework first.
> >To outline what I have done so far before posting my questions is:
> >1. Read the on-line installation documentation.
> >2. read through the on-line FAQs.
> >3. Did a number of searches on the list archives for answers
> to my questions.
> >4. Went to and read the information available at www.sendmail.org .
> >5. Searched the internet in general for what I was looking for.
> >So, now it is to the list that I am turning to see if I have
> found the
> >right answers, and further more, to share what I found in
> hopes that it
> >will one day help someone else.
> >I would like to have MailScanner running on one computer
> with the mail
> >server located on a second box.
> > From the link, Deploying MailScanner with Microsoft
> Exchange Server or
> > Postfix
> >(or any other unsupported mail server), which points the
> reader to Q16 of
> >the of the Installation FAQ, I gather that this is not out
> of the ordinary
> >and that it indeed can be done. In fact, I observed that
> there are some
> >instructions on how to do it. However, as a home linux user,
> I did not
> >quite understand all that was being explained. So I went
> looking for more
> >information to hopefully help me out. After a few days of
> digging around,
> >I uncovered the following information.
> > >From the Web site:
> >I read the article "A Linux Email Server" by Marcel Gagné.
> In this article
> >he talks about "Setting up Sendmail". (see below for excerpts)
> >My question are, would a configuration like that discussed
> in Marcel's
> >1. work with MailScanner.
> >2. fit my scenario for my home linux network?
> > >From the article:
> >"Depending on how your account is set up with your ISP, the
> domain name of
> >your server may be something like dhch3-ip1.theirdomain.com
> , which is not the
> >best name for setting up the email gateway. For a return
> address, user
> >"fred" would wind up as fred at dhcp3-ip.theirdomain.com, when
> sending mail
> >from the
> >local system. You can have the Sendmail program put in your
> domain name by
> >making the one modification that I recommend in the Sendmail
> >I mentioned that this email server is not going to be
> connected to the
> >Internet, but if you make this easy change now, you won't
> need to do it later.
> >Using your editor, open /etc/sendmail.cf and look for the
> lines shown in
> >Listing 1. Notice the part that talks about my official
> domain name. The
> >line that
> >reads Dj$w.Foo.COM has been copied and rewritten with the
> domain name to
> >define the "Dj" macro. A macro in Sendmail parlance is very
> much like an
> >variable in your Bourne, Korn, or C shell. The Dj macro
> references your
> >canonical hostname. For this article, I'll call the domain
> >That is the only change needed in the /etc/sendmail.cf file.
> The next file
> >to modify is /etc/sendmail.cw. This file contains a list of
> all the domains and
> >systems for which the server will accept mail. For instance,
> if you edit
> >the file with your editor, and add the domain name
> (mycompany.com) and the
> >name (localhost), you end up with this simple file:
> ># sendmail.cw - include all aliases for your machine here.
> >This tells the Sendmail daemon to accept mail messages
> addressed to either
> >user at localhost, or user at mycompany.com, or any of the aliases
> you have set up.
> >Next, you need to edit /etc/mail/relay-domains.
> >One of the great annoyances of modern email is SPAM (those
> unwanted bits
> >of advertising that seem to rain down in your email box).
> Particularly galling
> >are the spammers who use other people's email servers to
> route their mail
> >traffic. Fortunately, the modern incarnations of Sendmail
> make it difficult for
> >spammers to use your machine as a relay. In fact, unless otherwise
> >specified, Sendmail will refuse to deliver messages from unfamiliar
> >machines or domains.
> >That is where the relay-domains file comes into play. Edit
> the file and
> >add the following:
> >This should cover all hosts in your small, networked office,
> including any
> >need you have for using Sendmail to relay messages on the
> server. Be sure to
> >include the dot at the end of your localhost domain address
> (127.) and at
> >the end of your private network and domain (192.168.1.)."
> >"That's all you really need to do with Sendmail and IMAP in
> order to send
> >and receive mail on this small network.
> >To DNS or Not to DNS
> >For Sendmail to route mail properly, it must be able to
> resolve domain
> >names to IP addresses. An email server operating on the
> Internet uses DNS
> >for name resolution.
> >Simply put, a DNS, or Domain Name Server, takes a system's
> IP address and
> >converts it to a more "human" name (like
> mailserv.mycompany.com). It will also
> >convert that name back to its numeric IP address. On the server,
> >mailserv.mycompany.com would become 192.168.1.100, or
> vice-versa. This
> >requires the setup
> >of "zone" files and domain tables and can be quite complex.
> For the small
> >network here, it is easier to list
> host-to-name-to-IP-address mappings in the
> >/etc/hosts file:
> >127.0.0.1 localhost
> >192.168.1.100 mailserv.mycompany.com mailserv mycompany.com
> >192.168.1.31 john
> >192.168.1.32 myrtle
> >192.168.1.33 bonnie
> >192.168.1.34 gilbert
> >192.168.1.35 elvis
> >192.168.1.36 tux
> >Usually, the standard Linux install fires up with a DNS
> already present.
> >This is a simple version called a "caching nameserver". For
> this example,
> >you need
> >to get rid of it or it will try to use the DNS to resolve
> the address of
> >the local machine. The mail client will usually time out
> waiting for the system
> >to return with a failed DNS lookup, which is not a good
> idea. The easiest
> >way is to rename the /etc/resolv.conf file:
> ># mv /etc/resolv.conf /etc/resolv.conf.orig
> >Next, stop the DNS by shutting down the named daemon:
> ># /etc/rc.d/init.d/named stop
> >To make sure named does not restart on boot, use this command:
> ># chkconfig --del named
> >Of course, if your network has been set up for a while and
> you have a
> >fully configured DNS, you should simply continue using it."
> >For the full article:
> >Steve Dawes
> >PH: (403) 268-5527.
> >Mailto: sdawes at calgary.ca
> >This communication is intended ONLY for the use of the
> person or entity
> >named above and may contain information that is confidential
> or legally
> >privileged. If you are not the intended recipient named
> above or a person
> >responsible for delivering messages or communications to the
> >recipient, YOU ARE HEREBY NOTIFIED that any use,
> distribution, or copying
> >of this communication or any of the information contained in it is
> >strictly prohibited. If you have received this communication
> in error,
> >please notify us immediately by telephone and then destroy
> or delete this
> >communication, or return it to us by mail if requested by
> us. The City of
> >Calgary thanks you for your attention and cooperation.
> Julian Field Teaching Systems Manager
> jkf at ecs.soton.ac.uk Dept. of Electronics & Computer Science
> Tel. 023 8059 2817 University of Southampton
> Southampton SO17 1BJ
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