Warning `undefined parameter: mua_sender_restrictions` when `postconf -n`
Let me guess, you're running latest Postfix. Yep, Postfix maintainer of postfix added the
mua_client_restrictions on of the config file(s) ... in a partial manner.
The "bug" was introduced in https://github.com/vdukhovni/postfix/commit/99ff75430d5c908879caffc1125680ed68019021#diff-6f25157451e1bcb001a0a6926795486bR23
You can drop a line to the Victor, Postfix maintainer, for doing the partial introduction into the default Postfix-supplied file. Victor has not caught up with the GitHub culture yet, much less maintain a bugzilla for Postfix, but instead relies on other distro-specific bugzillas.
Or you can fix it yourself, with this StackExchange answer.
UPDATE: Or I can cut-n-paste the answer...
Add the following to your /etc/postfix/main.cf file.
smtpd_restriction_classes = mua_sender_restrictions, mua_client_restrictions, mua_helo_restrictions mua_client_restrictions = permit_sasl_authenticated, reject mua_sender_restrictions = permit_sasl_authenticated, reject mua_helo_restrictions = permit_mynetworks, reject_non_fqdn_hostname, reject_invalid_hostname, permit
master.cf configuration does not match. This is likely caused by copying configuration examples that were meant to go together and missing one side.
When you changed a setting for policyd-spf, in master.cf, you called your service
policyd-spf unix - n n - 0 spawn
but then in
main.cfyou are attempting to change its configuration without the
Then you did a similar thing with the
smtpd_*_restrictions. You refer to
mua_*settings, but did not define those anywhere.
If you added your custom restriction lists to
smtpd_restriction_classes, you could skip the
$when using them on the right hand side of restriction settings, which would net you more readable error messages in case of mistakes in configuration:
smtpd_restriction_classes = mua_sender_restrictions, mua_client_restrictions, mua_helo_restrictions, mua_sender_restrictions mua_client_restrictions = permit_sasl_authenticated, reject ...
And then in
smtps .. .. -o smtpd_client_restrictions=mua_client_restrictions
I highly recommend starting with a fresh set of stock configuration and step by step only add those changes you really do need.
Running postconf should issue zero warnings. Avoid running a system where
postconf already tells you some parts of your configuration did not work. Even with a number of safeguards included in postfix, it is easy to create a setup that will be abused by spammers.