When should I use this postfix.service?
Use it to restore a missing default, confirm what shipped, or diff against your current Postfix config.
Postfix /etc/systemd/postfix.service
Original
📋 CentOS Stream 9
22 lines
Works On
Viewing:
CentOS Stream 9
Same on:
Red Hat Enterprise Linux 8 (Ootpa)
Red Hat Enterprise Linux 9 (Plow)
Other versions:
Details
- Size
- 22 lines
- MD5
- e4965ef7ea7440b0ab58518c126d30d0
- SHA256
- 2d8f604c65075efecd40a81d7a9e7f8fcd9c2e5b6d335561a033ca7b6335495c
/etc/systemd/postfix.service
[Unit] Description=Postfix Mail Transport Agent After=syslog.target network.target Conflicts=sendmail.service exim.service [Service] Type=forking PIDFile=/var/spool/postfix/pid/master.pid EnvironmentFile=-/etc/sysconfig/network PrivateTmp=true CapabilityBoundingSet=~ CAP_NET_ADMIN CAP_SYS_ADMIN CAP_SYS_BOOT CAP_SYS_MODULE ProtectSystem=true PrivateDevices=true ExecStartPre=-/usr/sbin/restorecon -R /var/spool/postfix/pid ExecStartPre=-/usr/libexec/postfix/aliasesdb ExecStartPre=-/usr/libexec/postfix/chroot-update ExecStart=/usr/sbin/postfix start ExecReload=/usr/sbin/postfix reload ExecStop=/usr/sbin/postfix stop [Install] WantedBy=multi-user.target
Copy & Paste
curl:
curl https://exampleconfig.com/api/v1/config/original/e4965ef7ea7440b0ab58518c126d30d0?hint=postfix.service
wget:
wget -O postfix.service https://exampleconfig.com/api/v1/config/original/e4965ef7ea7440b0ab58518c126d30d0?hint=postfix.service
For AI Agents
<prompt><role>DevOps agent</role><source url='https://exampleconfig.com/api/v1/config/original/e4965ef7ea7440b0ab58518c126d30d0?hint=postfix.service' /><config><app>Postfix</app><os>CentOS Stream 9</os><location>/etc/systemd/postfix.service</location><lines>22</lines><md5>e4965ef7ea7440b0ab58518c126d30d0</md5><sha256>2d8f604c65075efecd40a81d7a9e7f8fcd9c2e5b6d335561a033ca7b6335495c</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
FAQ
How do I restore Postfix defaults?
Download the file, back up the current one in /etc/systemd/postfix.service, replace it, then reload or restart Postfix.
Is postfix.service safe for production?
It is the vendor default for CentOS Stream 9. 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 CentOS Stream 9.
Can I use this for Postfix troubleshooting?
Yes. Diff it against yours to find drift, then restore only the sections you need.
