| # case conversion for postmaster | 
 | pOsTmAsTeR	alias		postmaster | 
 |  | 
 | # local mail | 
 | [^!@]+		translate	"upas/aliasmail '&'" | 
 | local!(.*)	>>		$PLAN9/mail/box/\1/mbox | 
 | \l!(.*)		alias		\1 | 
 | (helix|helix.bell-labs.com)!(.*)	alias		\2 | 
 |  | 
 | # we can be just as complicated as BSD sendmail... | 
 | # convert source domain address to a chain a@b@c@d... | 
 | @([^@!,]*):([^!@]*)@([^!]*)	alias	\2@\3@\1 | 
 | @([^@!]*),([^!@,]*):([^!@]*)@([^!]*)	alias	@\1:\3@\4@\2 | 
 |  | 
 | # convert a chain a@b@c@d... to ...d!c!b!a | 
 | ([^@]+)@([^@]+)@(.+)	alias	\2!\1@\3 | 
 | ([^@]+)@([^@]+)		alias	\2!\1 | 
 |  | 
 | # /mail/lib/remotemail will take care of gating to systems we don't know | 
 | ([^!]*)!(.*) 		| 		"$PLAN9/mail/lib/qmail '\s' 'net!\1'" "'\2'" |