curl https://exampleconfig.com/api/v1/config/original/ca856d92fd47cc3031eb5d8d85842617?hint=main.cf.proto
wget -O main.cf.proto https://exampleconfig.com/api/v1/config/original/ca856d92fd47cc3031eb5d8d85842617?hint=main.cf.proto
# See /usr/share/postfix/main.cf.dist for a commented, more complete version # See http://www.postfix.org/COMPATIBILITY_README.html compatibility_level = 3.9 # Which domain that locally-originated mail appears to come from. # Debian policy suggests to read this value from /etc/mailname. #XX needs a review in postinst&config #myorigin = /etc/mailname #myorigin = $mydomain myorigin = $myhostname # Text that follows the 220 code in the SMTP server's greeting banner. # You MUST specify $myhostname at the start due to an RFC requirement. smtpd_banner = $myhostname ESMTP $mail_name (Debian) # IP protocols to use: ipv4, ipv6, or all # (set this explicitly so `post-install upgrade-configuration' wont complain) inet_protocols = all # List of "trusted" SMTP clients (maptype:mapname allowed) that have more # privileges than "strangers". If mynetworks is not specified (the default), # mynetworks_style is used to compute its value. #mynetworks_style = class #mynetworks_style = subnet mynetworks_style = host # mynetworks = 127.0.0.0/8 # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h # List of domains (maptype:mapname allowed) that this machine considers # itself the final destination for. mydestination = $myhostname, localhost.$mydomain, localhost # Maximum size of a user mailbox mailbox_size_limit = 51200000 # Optional external command to use instead of mailbox delivery. If set, # you must set up an alias to forward root mail to a real user. #mailbox_command = /usr/bin/procmail #mailbox_command = /usr/bin/procmail -a "$EXTENSION" mailbox_command = # List of alias maps to use to lookup local addresses. # Per Debian Policy it should be /etc/aliases. alias_maps = $alias_database, nis:mail.aliases # List of alias maps to make indexes on, when running newaliases. alias_database = hash:/etc/aliases # Notify (or not) local biff service when new mail arrives. # Rarely used these days. biff = no # Separator between user name and address extension (user+foo@domain) #recipient_delimiter = + recipient_delimiter = # A host to send "other" mail to #relayhost = $mydomain #relayhost = [gateway.example.com] #relayhost = [ip.add.re.ss]:port #relayhost = uucphost relayhost = # Where to look for Cyrus SASL configuration files. Upstream default is unset # (use compiled-in SASL library default), Debian Policy says it should be # /etc/postfix/sasl. cyrus_sasl_config_path = /etc/postfix/sasl
sudo apk add postfix
sudo apt update && sudo apt install postfix
sudo yum install postfix
sudo apt update && sudo apt install postfix
Use this original configuration file when you need to restore Postfix to its default state after misconfiguration, during fresh installations, or as a baseline for customization. It's particularly useful for troubleshooting when your current config isn't working properly.
Download this file and replace your current configuration at /etc/postfix/main.cf.proto
. Make sure to backup your existing configuration first, then restart the Postfix service to apply the changes.
This is the factory-default configuration that ships with Postfix on Debian 13 (Trixie). While it provides a secure baseline, you should review and customize security settings based on your specific production requirements and compliance needs.
This configuration is specifically from Debian 13 (Trixie). Different operating systems and versions may have slightly different default settings, security patches, or feature availability. Check the compatibility section above for other OS versions.
Yes, this original configuration is excellent for troubleshooting. Compare it with your current settings to identify modifications that might be causing issues, or temporarily replace your config with this one to isolate problems.