Re: sendmail (or exim) help, please
On Fri, Feb 25, 2000 at 05:39:08AM +0800, runner@matavnet.hu wrote
> Hi !
>
> Is it possibble to masquarade my e-mail to the outside world from
> my LAN ? I'll tell you exactly what I wanted to say. I have a local
> LAN, one e-mail address. I have set up a local DNS and ipchains
> rules but I stopped at sendmail. I want to relay mail for the local
> machines and put the mail into a queue if it goes to the inet but
> deliver immediatelly inside the LAN. The domain has the name
> "linbase.org" (not registreted) so all of the outgoing mails have to
> have "runner@matavnet.hu" (the valid mail address) at the From:
> and in the Reply-to: fields, not someone@linbase.org.
> Please, help me, how to setup this ! I welcome any URLs, RTFMs,
> HOWTOs if it's apart from the "official" docs in the distros,
> because I have already read through them but (maybe I'm too dumb
> or overlooked something) found nothing to my special problem.
> Does anyone has a working solution to the situation like this ? If
> you have a solution with Exim I would welcome it too.
> Thanx a lot,
> Ago
>
I do this with exim; we have two dialup accounts, and a local
LAN. We want outgoing mail to have our dial-up account name
in From and Reply-To, but we want local mail (including mail
addressed to the dial-up account names) delivered directly.
We also want to be able to send mail to other dial-up users
at our ISP.
What I've done is this:
- Listed our ISP mail host name in local_domains in /etc/exim.conf:
local_domains = localhost:*.localnet:isp.net.au
- Added a special director that handles locally-generated mail for
one of our dialup accounts, at the head of the list of directors:
dialup_localusers:
driver = aliasfile
domains = isp.net.au
file = /etc/exim/isp-addresses
search_type = lsearch
/etc/exim/isp-addresses is a regular alias file that maps ISP
account names to local usernames (or other addresses), like this:
huiac: john@huiac.localnet
- Added another director after that one, that deals with any other
customers of our ISP:
dialup_otherusers:
driver = smartuser
domains = isp.net.au
transport = remote_smtp
- If I had accounts at more than one ISP, I'd need to create
a separate alias file and two directors (local users/other
ISP users) for each ISP.
- Use a smarthost (our ISP) for delivering non-local mail; as the
local machine is mailserver for our entire LAN, this is the only
entry in the ROUTERS section of /etc/exim.conf:
smarthost:
driver = domainlist
transport = remote_smtp
route_list = "* mail.isp.net.au bydns_a"
If I wanted to deliver mail to other machines on my internal LAN,
I'd need an additional router ahead of this one to handle those.
- Added rewriting rules to replace our local LAN addresses with
the appropriate ISP account addresses in any headers:
*@huiac.localnet ${lookup{$1}lsearch{/etc/exim/outgoing-addresses}\
{$value}fail} Fh
/etc/exim/outgoing-addresses contains lines like this:
john huiac@isp.net.au
This example replaces the address john@huiac.localnet with
huiac@isp.net.au in all headers except envelope "To:" headers.
Simpler schemes are possible, but this is the only one I've
devised so far that will deliver locally-generated mail
addressed to one of my dial-up accounts (e.g.,
<huiac@isp.net.au>) as local mail (i.e., without going via my
ISP's mailserver), deals with multiple dial-up account names
and also correctly delivers mail to other people's accounts
on my ISP.
John P.
--
huiac@camtech.net.au
john@huiac.apana.org.au
"Oh - I - you know - my job is to fear everything." - Bill Gates in Denmark
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