--inet_protocols = ipv4
-+unknown_address_reject_code = 550
-diff -urNp -x '*.orig' postfix-3.7.0.org/src/global/mail_params.h postfix-3.7.0/src/global/mail_params.h
---- postfix-3.7.0.org/src/global/mail_params.h 2022-01-24 01:03:32.000000000 +0100
-+++ postfix-3.7.0/src/global/mail_params.h 2022-04-04 19:57:04.594313194 +0200
-@@ -107,7 +107,7 @@ extern uid_t var_owner_uid;
++biff = no
+ inet_protocols = ipv4
+ shlib_directory = /usr/lib/postfix/${mail_version}
+ meta_directory = /etc/postfix
+diff -ur postfix-3.10.6.orig/src/global/mail_params.h postfix-3.10.6/src/global/mail_params.h
+--- postfix-3.10.6.orig/src/global/mail_params.h 2025-10-24 16:41:15.000000000 +0200
++++ postfix-3.10.6/src/global/mail_params.h 2025-11-29 12:43:48.478151951 +0100
+@@ -107,7 +107,7 @@