dnl Setup sendmail+cyrusv2 to do a From: address verification
define(`CYRUS_SMMAPD_SOCKET', `local:/var/imap/socket/smmapd')dnl

LOCAL_CONFIG
# Cyrus smmapd(8)'s map for verifying mailboxes of local recipients
Kcyrus socket -a<OK> -T<TMPF> CYRUS_SMMAPD_SOCKET

LOCAL_RULESETS
HFrom:		$>FromCheck

SLocal_check_mail
R$*		$: $>FromCheck $1

SFromCheck
R$*		$: $1
# Strip parenthesis
R$* ( $* ) $*	$: $1
# Strip brackets
R$* < $* > $*	$: $2
# match only $=w class addresses
R$* @ $=w	$: $>check_cyrus $1 @ $2

Scheck_cyrus
# Query smmapd(8)
R$+			$: <!> $1 $| $(cyrus $1 $: $)
# Cyrus says OK
R<!> $* $| $* <OK>	$@ $1					
# Over quota or lookup failure
R<!> $* $| $* <TMPF>	$# error $@ 4.3.0 $: "451 Lookup failure or user may be over quota."	
# No mailbox
R<!> $* $| $*		$# error $@ 5.7.1 $: "550 Trying to send from an invalid local user."