+
+procmail:
+ debug_print = "R: procmail for $local_part@$domain"
+ driver = accept
+ domains = +local_domains
+ check_local_user
+ transport = procmail_pipe
+ # emulate OR with "if exists"-expansion
+ require_files = ${local_part}:\
+ ${if exists{/etc/procmailrc}\
+ {/etc/procmailrc}{${home}/.procmailrc}}:\
+ +/usr/bin/procmail
+ no_verify
+ no_expn
+