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strugee
Asked: 2020-06-24 01:14:43 +0800 CST

Is it possible to append to Postfix default parameter values?

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I'd like to append to the default Postfix value of local_recipient_maps, defined as:

% postconf | grep '^local_recipient_maps'
postconf: warning: /etc/postfix/master.cf: undefined parameter: mua_sender_restrictions
postconf: warning: /etc/postfix/master.cf: undefined parameter: mua_client_restrictions
postconf: warning: /etc/postfix/master.cf: undefined parameter: mua_helo_restrictions
local_recipient_maps = proxy:unix:passwd.byname $alias_maps

Based on the documentation it seemed like I should be able to just reference the default value in the new value, so I did:

# postconf 'local_recipient_maps = $local_recipient_maps hash:/var/lib/mailman3/data/postfix_lmtp'

but when I run postconf again, it gives me a macro error:

% postconf | grep '^local_recipient_maps'
postconf: warning: /etc/postfix/master.cf: undefined parameter: mua_sender_restrictions
postconf: warning: /etc/postfix/master.cf: undefined parameter: mua_client_restrictions
postconf: warning: /etc/postfix/master.cf: undefined parameter: mua_helo_restrictions
postconf: warning: unreasonable macro call nesting: "local_recipient_maps"
postconf: fatal: macro processing error

Obviously this is not a big deal because I can just copy and paste the original default value, but I'd like to know if I'm doing something wrong/if this is (supposed to be) possible because it makes for a nice way to separate different parts of parameters into sections with a comment header explaining what they're for (e.g. this one is going into a # Mailman section, because obviously only the last map in local_recipient_maps is related to Mailman).

If it matters, I am on Postfix 3.4.10-0+deb10u1 (according to apt policy postfix) on Debian 10.

postfix

1 Answers

  1. If you defined all the mua_* parameters in main.cf, they must have something corresponding that actually exists.

    Getting to your exact case, you most likely have something like:

    smtpd_restriction_classes = mua_sender_restrictions, mua_client_restrictions, mua_helo_restrictions

    but you did not define in your *.cf smtpd_client_restrictions=mua_client_restrictions

    You should have something that finally looks like:

    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
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