[pfx] Re: Problem with /var/spool/postfix/etc/resolv.conf after removing systemd-resolved
On Tue, 4 Jun 2024, Chris Green via Postfix-users wrote: I run dnsmasq instead of systemd-resolved on all my systems. You need to make sure you've disabled it and whatever associated scaffolding edits resolv.conf or that you understand the mechanism. [...] It turned out that the file /var/spool/postfix/etc/resolv.conf was:- nameserver 127.0.0.53 That's an artifact of systemd-resolved and the distributions which ship it. You may also need to understand why postfix is using /var/spool/postfix/etc/resolv.conf instead of /etc/resolv.conf. Maybe it's copying it from /etc/resolv.conf. You might use that behavior to your advantage by having it copy from some other location which you maintain. -- Fred Morris ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] Re: Problem with /var/spool/postfix/etc/resolv.conf after removing systemd-resolved
Chris Green via Postfix-users: > I run dnsmasq instead of systemd-resolved on all my systems. > > I recently moved my dekstop server to new hardware running xubuntu > 24.04 replacing my previous system that was running xubuntu 22.04. > > I installed dnsmasq and removed systemd-resolved and all seemed well > until I noticed I couldn't send E-Mail, I run a postfix 3.8.6 server > which sends outgoing E-Mail via my ISP's smarthost. > > In the mail.log I was seeing lots of messages like:- > > 2024-06-02T00:10:30.652648+01:00 q957 postfix/smtp[8733]: 9763C3542024: > to=, relay=none, delay=8729, delays =8729/0.02/0/0, > dsn=4.4.3, status=deferred (Host or domain name not found. Name service error > for name=smtp-auth.mythic-beasts.com type=A: Host not found, try again) > > But running 'host smtp-auth.mythic-beasts.com' returned a perfectly OK > address. > > It turned out that the file /var/spool/postfix/etc/resolv.conf was:- > > nameserver 127.0.0.53 > options edns0 trust-ad > search zbmc.eu > > Changing it to:- > > nameserver 127.0.0.53 > options edns0 trust-ad > search zbmc.eu > > Has fixed the problem. Those two sets of lines are identical. > However I'm sure this isn't the 'right' way to do this. How do I get > postfix to pick up the resolv.conf file that is used/created by dnsmasq? Postfix does not import system files under /var/spool/postfix (the list of files needed is OS-specific). Those files are normally copied by OS-specific scripts that start Postfix. Wietse ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] Re: Problem with /var/spool/postfix/etc/resolv.conf after removing systemd-resolved
On 04.06.24 10:00, Chris Green via Postfix-users wrote: I run dnsmasq instead of systemd-resolved on all my systems. I recently moved my dekstop server to new hardware running xubuntu 24.04 replacing my previous system that was running xubuntu 22.04. I installed dnsmasq and removed systemd-resolved and all seemed well until I noticed I couldn't send E-Mail, I run a postfix 3.8.6 server which sends outgoing E-Mail via my ISP's smarthost. In the mail.log I was seeing lots of messages like:- 2024-06-02T00:10:30.652648+01:00 q957 postfix/smtp[8733]: 9763C3542024: to=, relay=none, delay=8729, delays =8729/0.02/0/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=smtp-auth.mythic-beasts.com type=A: Host not found, try again) But running 'host smtp-auth.mythic-beasts.com' returned a perfectly OK address. It turned out that the file /var/spool/postfix/etc/resolv.conf was:- nameserver 127.0.0.53 options edns0 trust-ad search zbmc.eu Changing it to:- nameserver 127.0.0.53 options edns0 trust-ad search zbmc.eu Has fixed the problem. they look the same, didn't you set nameserver to 127.0.0.1 instead? However I'm sure this isn't the 'right' way to do this. How do I get postfix to pick up the resolv.conf file that is used/created by dnsmasq? restarting postfix does set up proper environment, should apply on Ubuntu. After changing resolv.conf restarting postfix should fix this. -- Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. Support bacteria - they're the only culture some people have. ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
[pfx] Re: Problem with /var/spool/postfix/etc/resolv.conf after removing systemd-resolved
On Tue, Jun 04, 2024 at 10:00:28AM +0100, Chris Green via Postfix-users wrote: > I run dnsmasq instead of systemd-resolved on all my systems. > > I recently moved my dekstop server to new hardware running xubuntu > 24.04 replacing my previous system that was running xubuntu 22.04. > > I installed dnsmasq and removed systemd-resolved and all seemed well > until I noticed I couldn't send E-Mail, I run a postfix 3.8.6 server > which sends outgoing E-Mail via my ISP's smarthost. > > In the mail.log I was seeing lots of messages like:- > > 2024-06-02T00:10:30.652648+01:00 q957 postfix/smtp[8733]: 9763C3542024: > to=, relay=none, delay=8729, delays =8729/0.02/0/0, > dsn=4.4.3, > status=deferred (Host or domain name not found. Name service error for > name=smtp-auth.mythic-beasts.com type=A: Host not found, try again) > > But running 'host smtp-auth.mythic-beasts.com' returned a perfectly OK > address. > > It turned out that the file /var/spool/postfix/etc/resolv.conf was:- > > nameserver 127.0.0.53 > options edns0 trust-ad > search zbmc.eu > > Changing it to:- > > nameserver 127.0.0.53 > options edns0 trust-ad > search zbmc.eu > > Has fixed the problem. > > However I'm sure this isn't the 'right' way to do this. How do I get > postfix to pick up the resolv.conf file that is used/created by dnsmasq? > Ooops!!! That should be Changing it to:- nameserver 127.0.0.1 options edns0 trust-ad search zbmc.eu of course! On investigating further it seems that on older systems where I have done this (moved from systemd-resolved to dnsmasq) I have simply hand-edited /etc/resolv.conf and then postfix copies that version to /var/spool/postfix/etc/resolv.conf and all is well. So, is that as it should be? -- Chris Green ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
