Works On

Viewing:

Ubuntu 24.04 LTS (Noble Numbat)

Same on:

Other versions:

Debian 12 (Bookworm) Debian 13 (Trixie)

Details

Size: 10 lines
MD5: 656a1893f3f9d1058f769fdb9cd7a614
SHA256: a7f3e175f647d63e902304bba0e07c6f5acd451b33a907468a17693cac5aaa5d

/etc/systemd/postfix-resolvconf.service

[Unit]
Description=Copies updated resolv.conf to postfix chroot and restarts postfix.
Documentation=man:postfix(1) man:resolvconf(8)

[Service]
Type=simple
ExecStart=/etc/resolvconf/update-libc.d/postfix

[Install]
WantedBy=multi-user.target

Copy & Paste

curl:

curl https://exampleconfig.com/api/v1/config/original/656a1893f3f9d1058f769fdb9cd7a614?hint=postfix-resolvconf.service

wget:

wget -O postfix-resolvconf.service https://exampleconfig.com/api/v1/config/original/656a1893f3f9d1058f769fdb9cd7a614?hint=postfix-resolvconf.service

For AI Agents

<prompt><role>DevOps agent</role><source url='https://exampleconfig.com/api/v1/config/original/656a1893f3f9d1058f769fdb9cd7a614?hint=postfix-resolvconf.service' /><config><app>Postfix</app><os>Ubuntu 24.04 LTS (Noble Numbat)</os><location>/etc/systemd/postfix-resolvconf.service</location><lines>10</lines><md5>656a1893f3f9d1058f769fdb9cd7a614</md5><sha256>a7f3e175f647d63e902304bba0e07c6f5acd451b33a907468a17693cac5aaa5d</sha256></config></prompt>

Paste into Claude, ChatGPT, or any AI assistant.

Install Postfix

Alpine Linux

sudo apk add postfix

Debian

sudo apt update && sudo apt install postfix

Red Hat Enterprise Linux

sudo yum install postfix

Ubuntu

sudo apt update && sudo apt install postfix

File Location

File Path

/etc/systemd/postfix-resolvconf.service

FAQ

When should I use this postfix-resolvconf.service?

Use it to restore a missing default, confirm what shipped, or diff against your current Postfix config.

How do I restore Postfix defaults?

Download the file, back up the current one in /etc/systemd/postfix-resolvconf.service, replace it, then reload or restart Postfix.

Is postfix-resolvconf.service safe for production?

It is the vendor default for Ubuntu 24.04 LTS (Noble Numbat). Treat it as a baseline and review security and performance settings before production use.

How does this differ from other OS versions?

Defaults vary by distro and version. This copy matches Ubuntu 24.04 LTS (Noble Numbat).

Can I use this for Postfix troubleshooting?

Yes. Diff it against yours to find drift, then restore only the sections you need.

Postfix /etc/systemd/postfix-resolvconf.service