+ # remote port numbers vary
+ s/(Connection request from 127.0.0.1 port) \d{1,5}/$1 sssss/;
+
+ # Skip hosts_require_dane checks when the options
+ # are unset, because dane ain't always there.
+
+ next if /in\shosts_require_dane\?\sno\s\(option\sunset\)/x;
+
+ # SUPPORT_PROXY
+ next if /host in hosts_proxy\?/;
+
+ # Experimental_International
+ next if / in smtputf8_advertise_hosts\? no \(option unset\)/;
+
+ # Environment cleaning
+ next if /\w+ in keep_environment\? (yes|no)/;
+
+ # Sizes vary with test hostname
+ s/^cmd buf flush \d+ bytes$/cmd buf flush ddd bytes/;
+
+ # Spool filesystem free space changes on different systems.
+ s/^((spool|log) directory space =) \d+K (inodes =) \d+/$1 nnnnnK $3 nnnnn/;
+