On Thu, 2005-10-27 at 21:26, Philip Prindeville wrote:
> I'm running FC3 (updated) on a handful of machines.
>
> I have a single IP address, with a NATing router set to that
> address. I have a domain, and an MX which points through
> the router at my mail server (or rather, the router is configured
> to port-forward 25, 143, etc to the mail server).
>
> I also have several mail clients on my 192.168.1.x network.
>
> The issues are the following:
>
> * the clients have a smart host (DS) defined as the mail relay,
> but they canonical its name and then look it up in the DNS,
> trying to contact it on the external IP address (and not its
> internal 192.168.1.x address in the /etc/hosts file). My
> /etc/nsswitch.conf file is unmodified.
Mailers always use MX records (since that's what they are
for) unless you specify otherwise by putting the name or IP
address in [] brackets. You should probably configure
the MTA clients to send to your server via smtp instead
of a local sendmail, as well as configuring the non-server
sendmail's to use MAIL_HUB with the server's address so
all of your local mail ends up on one server. Your
mail server should use SMART_HOST with your ISP's relay
host.
> * the clients then try to relay the email with a sender's envelope
> address as user@xxxxxxxxxxxxxx, which the relay rejects
> because "host.my-domain" doesn't resolve in the DNS.
Set MASQUERATE_AS to your public domain name, and
FEATURE((masquerade_envelope)
in sendmail.mc
> * I should probably have define(`LOCAL_RELAY', `:$S') to
> handle forwarding everything to the mail server.
SMART_HOST should be fine.
> I used to know all of this stuff once upon a time...
>
> Am I missing anything?
Add your public DNS name to the local-host-names file
if your server doesn't use that name itself so it will
accept inbound mail.
Don't mess with sendmail.cf, edit sendmail.mc, run
make and restart sendmail.
--
Les Mikesell
lesmikesell@xxxxxxxxx
