Am Fr, den 28.10.2005 schrieb Philip Prindeville um 4:26: > 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. > > * 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. > > * I should probably have define(`LOCAL_RELAY', `:$S') to > handle forwarding everything to the mail server. > > I used to know all of this stuff once upon a time... > -Philip Reading this I have the strong feeling it was you I was talking to in #sendmail on freenode this evening (night) :) I would vote for running a local DNS (bind) service, in conjunction with DHCP and dynamic zone updates. That would be ideal. And for unqualified sender addresses use the masquerading features of Sendmail. On the other hand you may go this route: do not run local Sendmail daemons, but use the submission process to directly feed outgoing mail from inner clients to the central mail hub. Have a look at /etc/mail/submit.mc. Comment out (remove the leading "dnl") for define(`confDIRECT_SUBMISSION_MODIFIERS',`C') and even add a line FEATURE(`nocanonify', `canonify_hosts') and finally change the IP in FEATURE(`msp', `[127.0.0.1]')dnl to the one of the central mail hub. Please see http://www.sendmail.org/m4/msp.html or better the current cf/README coming with your Sendmail on Fedora. Many discussion about this topic to be found through http://groups.google.com/groups?hl=en&lr=&c2coff=1&sa=X&oi=groupst&q=Sendmail+confDIRECT_SUBMISSION_MODIFIERS Hope it helps. Alexander -- Alexander Dalloz | Enger, Germany | GPG http://pgp.mit.edu 0xB366A773 legal statement: http://www.uni-x.org/legal.html Fedora Core 2 GNU/Linux on Athlon with kernel 2.6.11-1.35_FC2smp Serendipity 06:01:53 up 6 days, 10:02, load average: 0.37, 0.23, 0.18
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