.ifdef SRS

# This exim config fragment is currently untested, but it lays
# out approximately how one might go about setting up SRS in exim.

# A redirect router which catches all SRS bounces. It requests an
# address translation from the SRS daemon. The exim rule does NOT
# have caseful_local_part because we want the local_part_prefix to
# match caselessly. Exim will preserve case when passing requests
# to the daemon.

srs_bounce:
	driver = redirect
	allow_fail
	local_part_prefix = srs0+ : srs0- : srs0= : srs1+ : srs1- : srs1=
	address_data = ${readsocket{/tmp/srsd}\
		{REVERSE $local_part@$domain\n}\
					{5s}{\n}{:fail: SRS daemon failure}}
	data = ${quote_local_part:${local_part:$address_data}}@${domain:$address_data}
	no_verify



# Ideally, we want this only to match forwarded mail. Currently, it
# matches only mail sourced nonlocally.

srs_forward:
	senders = ! : ! *@+local_domains : ! *@+virtual_domains
	address_data = ${readsocket{/tmp/srsd}\
		{FORWARD $sender_address_local_part@$sender_address_domain $primary_hostname\n}\
					{5s}{\n}{:fail: SRS daemon failure}}
	errors_to = ${quote_local_part:${local_part:$address_data}}@${domain:$address_data}
	headers_add = "X-SRS-Rewrite: Sender address rewritten from <$sender_address> by $primary_hostname."
	driver = redirect
	data = ${quote_local_part:$local_part}@$domain



# Alternatively, we may simply be able to use the following
# rewriting rules:
#
#^(?i:srs0[-+=])	${readsocket{/tmp/srsd}{REVERSE $0\n}{5s}{\n}\
#								{:fail: SRS daemon failure}} T
#^(?i:srs1[-+=])	${readsocket{/tmp/srsd}{REVERSE $0\n}{5s}{\n}\
#								{:fail: SRS daemon failure}} T
#*				${readsocket{/tmp/srsd}{FORWARD $0 SRSDOMAIN}{5s}{\n}\
#								{:fail: SRS daemon failure}} F

.endif // SRS