On Fri, 2005-10-28 at 06:18 +0200, Alexander Dalloz wrote: > 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. ---- the alternative to running local dns is to use /etc/hosts to define a locally available name that doesn't resolve properly via dns isn't it? It would strike me as simpler to add the name to /etc/hosts but I still prefer just using the ip address in sendmail.mc Craig -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.
