use_shell boolean false pipe 1.70
user string + routers 4.00
unset transports 4.00 replaces individual options
-utf8_downcvt integer unset smtp 4.92 if SUPPORT_I18N
+utf8_downconvert integer unset smtp 4.92 if SUPPORT_I18N
uucp_from_pattern string + main 1.75
uucp_from_sender string* "$1" main 1.75
verify boolean true routers 4.00