"Eric B." <ebe...@hotmail.com> wrote in message news:hcupsk$b8...@ger.gmane.org... > "Victor Duchovni" <victor.ducho...@morganstanley.com> wrote in message > news:20091104232940.gi27...@np305c2n2.ms.com... >> On Wed, Nov 04, 2009 at 06:16:56PM -0500, Eric B. wrote: >> >>> Is there no way to direct Postfix to a different DNS server (as opposed >>> to >>> the ones specified in resolve.conf) either for a particular domain, or >>> for >>> all domains altogether? >> >> If you chroot-jail the smtp(8) delivery agent, it will use the >> resolv.conf >> file in the chroot jail. This is ugly, you are probably solving the >> wrong problem. > > Interesting thought. I agree that this is somewhat ugly, but might be > something worth investigating...
Ok - now I am very confused. I tried setting up Postfix in a chroot jail, and specified a different set of nameservers in /var/spool/postfix/etc/resolv.conf. However, it seems as though Postfix continues to use the name servers specified in /etc/resolv.conf and not the ones in the chroot jail. I have gone so far as to create an empty /var/spool/.../resolv.conf with no nameservers specified, and yet postfix is still able to deliver the email (to the wrong server). I would have expected that leaving the nameservers blank would have caused Postfix to choke, and yet it still connects. I definitley have chroot set to Y in my master.cf file, and have done a postfix restart. I do get a warning on restart that postfix/postfix-script: warning: /var/spool/postfix/etc/resolv.conf and /etc/resolv.conf differ Or does the fact that they differ cause the chroot to fail, and the process ends up running in regular mode instead? I have gone as far as deleting the /var/spool/postfix/lib and lib64 directories, and postfix still starts without any error messages. And when I try to mail something, it still manages to send the mail. So that gives me confirmation that the chroot isn't working properly. Apart from setting chroot to y in master.cf, is there anything else I have to do to enable it properly? Thanks, Eric
