qualify_domain: $qualify_domain
bounce_return_size_limit: ${bounce_return_size_limit}
spool_directory: $spool_directory
+queue_name: $queue_name
unknown: ${unknown}
h_subject: $h_subject:(should be empty)
h_subject:$h_subject (should be empty)
${extract{ }{X=3}}
${extract{ 2 }{ }{a b c}}
+${map{a,1:b,2:c,3}{${extract{1}{,}{$item}{$value}{}}}}
+${map{a,1:b,2:c,3}{${extract{1}{,}{$item}{$value}{failcase}{bogus_argument}}}}
+${map{a,1:b,2:c,3}{${extract{1}{,}{$item}{$value}fail}}}
+
# Translation
abcdea aaa xyz ${tr{abcdea}{aaa}{xyz}}