[exim-config] / base.m4

### -*-m4-*-
###
### Basic settings for distorted.org.uk Exim configuration
###
### (c) 2012 Mark Wooding
###

###----- Licensing notice ---------------------------------------------------
###
### This program is free software; you can redistribute it and/or modify
### it under the terms of the GNU General Public License as published by
### the Free Software Foundation; either version 2 of the License, or
### (at your option) any later version.
###
### This program is distributed in the hope that it will be useful,
### but WITHOUT ANY WARRANTY; without even the implied warranty of
### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
### GNU General Public License for more details.
###
### You should have received a copy of the GNU General Public License
### along with this program; if not, write to the Free Software Foundation,
### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

###--------------------------------------------------------------------------
### Global settings.

SECTION(global, priv)m4_dnl
admin_groups = CONF_admin_groups
prod_requires_admin = false

SECTION(global, logging)m4_dnl
log_file_path = : syslog
log_selector = \
	+smtp_confirmation \
	+tls_peerdn
log_timezone = true
syslog_duplication = false
syslog_timestamp = false

SECTION(global, daemon)m4_dnl
local_interfaces = <; CONF_interfaces
extra_local_interfaces = <; 0.0.0.0 ; ::

SECTION(global, resource)m4_dnl
deliver_queue_load_max = 8
queue_only_load = 12
smtp_accept_max = 16
smtp_accept_queue = 32
smtp_accept_reserve = 4
smtp_load_reserve = 10
smtp_reserve_hosts = +trusted

SECTION(global, policy)m4_dnl
host_lookup = *

SECTION(global, users)m4_dnl
gecos_name = $1
gecos_pattern = ([^,:]*)

SECTION(global, incoming)m4_dnl
received_header_text = Received: \
	${if def:sender_rcvhost \
	     {from $sender_rcvhost\n\t} \
	     {${if def:sender_ident \
		   {from ${quote_local_part:$sender_ident} }}}}\
	by $primary_hostname \
	(Exim $version_number)\
	${if def:tls_cipher {\n\t} { }}\
	${if def:received_protocol \
	     {with $received_protocol \
	      ${if def:tls_cipher {(cipher=$tls_cipher)}}}}\n\t\
	${if def:sender_address \
	     {(envelope-from $sender_address\
	      ${if def:authenticated_id \
		   {; auth=$authenticated_id}})\n\t}}\
	id $message_exim_id\
	${if def:received_for {\n\tfor $received_for}}

SECTION(global, smtp)m4_dnl
smtp_return_error_details = true
accept_8bitmime = true

SECTION(global, process)m4_dnl
extract_addresses_remove_arguments = false
headers_charset = utf-8
qualify_domain = CONF_master_domain

SECTION(global, bounce)m4_dnl
delay_warning = 1h : 24h : 2d

DIVERT(null)
###--------------------------------------------------------------------------
### Access control lists.

SECTION(global, acl-after)
SECTION(global, acl)m4_dnl
acl_smtp_helo = helo
SECTION(acl, misc)m4_dnl
helo:
	## Check that the caller's claimed identity is actually plausible.
	## This seems like it's a fairly effective filter on spamminess, but
	## it's too blunt a tool.  Rather than reject, add a warning header.
	## Only we can't do this the easy way, so save it up for use in MAIL.
	## Also, we're liable to get a subsequent HELO (e.g., after STARTTLS)
	## and we should only care about the most recent one.
	warn	 set acl_c_helo_warning = false
		!condition = \
			${if exists {CONF_sysconf_dir/helo.conf} \
			     {${lookup {$sender_helo_name} \
				       partial0-lsearch \
				       {CONF_sysconf_dir/helo.conf} \
				       {${if match_ip \
					     {$sender_host_address} \
					     {$value}}}}}}
		!verify = helo
		 set acl_c_helo_warning = true

	accept

SECTION(global, acl)m4_dnl
acl_not_smtp_start = not_smtp_start
SECTION(acl, misc)m4_dnl
not_smtp_start:
	## Record the user's name.
	warn	 set acl_c_user = $sender_ident

	## Done.
	accept

SECTION(global, acl)m4_dnl
acl_smtp_mail = mail
SECTION(acl, mail)m4_dnl
mail:

	## If we stashed a warning header about HELO from earlier, we should
	## add it now.
	warn	 condition = $acl_c_helo_warning
		 add_header = :after_received:X-Distorted-Warning: \
			BADHELO \
			Client's HELO doesn't match its IP address.\n\t\
			HELO name=$sender_helo_name, \
			address=$sender_host_address

	## Always allow the empty sender, so that we can receive bounces.
	accept	 senders = :

	## Ensure that the sender is routable.  This is important to prevent
	## undeliverable bounces.
	require	 message = Invalid sender; \
			($sender_verify_failure; $acl_verify_message)
		 verify = sender

	## If this is directly from a client then hack on it for a while.
	warn	 condition = ${if eq{$acl_c_mode}{submission}}
		 control = submission

	## Insist that a local client connect through TLS.
	deny	 message = Hosts within CONF_master_domain must use TLS
		!condition = ${if eq{$acl_c_mode}{submission}}
		 hosts = +allnets
		!encrypted = *

	## Check that a submitted message's sender address is allowable.
	require	 acl = mail_check_auth

SECTION(acl, mail-tail)m4_dnl
	## And we're done.
	accept

SECTION(global, acl)m4_dnl
acl_smtp_connect = connect
SECTION(acl, connect)m4_dnl
connect:
SECTION(acl, connect-tail)m4_dnl
	## Configure variables according to the submission mode.
	warn	 acl = check_submission

	## Done.
	accept

check_submission:
	## See whether this message needs hacking on.
	accept	!hosts = +localnet
		!condition = ${if ={$received_port}{CONF_submission_port}}
		 set acl_c_mode = relay

	## Remember to apply submission controls.
	warn	 set acl_c_mode = submission

	## Done.
	accept

SECTION(global, acl)m4_dnl
acl_smtp_rcpt = rcpt
SECTION(acl, rcpt)m4_dnl
rcpt:

	## Reject if the client isn't allowed to relay and the recipient
	## isn't in one of our known domains.
	deny	 message = Relaying not permitted
		!hosts = CONF_relay_clients
		!authenticated = *
		!domains = +known

	## Ensure that the recipient is routable.
	require	 message = Invalid recipient \
			($recipient_verify_failure; $acl_verify_message)
		 verify = recipient

SECTION(acl, rcpt-tail)m4_dnl
	## Everything checks out OK: let this one go through.
	accept

SECTION(global, acl)m4_dnl
acl_smtp_data = data
SECTION(acl, data)m4_dnl
data:

SECTION(acl, data-tail)m4_dnl
	accept

SECTION(global, acl)m4_dnl
acl_smtp_expn = expn_vrfy
acl_smtp_vrfy = expn_vrfy
SECTION(acl)m4_dnl
expn_vrfy:
	accept	 hosts = +trusted
	deny	 message = Suck it and see

DIVERT(null)
###--------------------------------------------------------------------------
### Verification of sender address.

SECTION(acl, misc)m4_dnl
mail_check_auth:

	## If this isn't a submission then it doesn't need checking.
	accept	 condition = ${if !eq{$acl_c_mode}{submission}}

	## If the caller hasn't formally authenticated, but this is a
	## loopback connection, then we can trust identd to tell us the right
	## answer.  So we should stash the right name somewhere consistent.
	warn	 set acl_c_user = $authenticated_id
		 hosts = +localnet
		!authenticated = *
		 set acl_c_user = $sender_ident

	## User must be authenticated.
	deny	 message = Sender not authenticated
		!hosts = +localnet
		!authenticated = *

	## Make sure that the local part is one that the authenticated sender
	## is allowed to claim.
	deny	 message = Sender address forbidden to calling user
		!condition = ${LOOKUP_DOMAIN($sender_address_domain,
			       {${if and {{match_local_part \
					    {$acl_c_user} \
					    {+dom_users}} \
					  {match_local_part \
					    {$sender_address_local_part} \
					    {+dom_locals}}}}},
			       {${if and {{match_local_part \
					    {$sender_address_local_part} \
					    {+user_extaddr}} \
					  {or {{eq {$sender_address_domain} \
						   {}} \
					       {match_domain \
						 {$sender_address_domain} \
						 {+public}}}}}}})}

	## All done.
	accept

DIVERT(null)
###--------------------------------------------------------------------------
### Common options for forwarding routers.

## We're pretty permissive here.
m4_define(<:FILTER_BASE:>,
	<:driver = redirect
	modemask = 002
	check_owner = false
	check_group = false
	allow_filter = true
	allow_defer = true
	allow_fail = true
	forbid_blackhole = false
	check_ancestor = true:>)

## Common options for forwarding routers at verification time.
m4_define(<:FILTER_VERIFY:>,
	<:verify_only = true
	user = CONF_filter_user
	forbid_filter_dlfunc = true
	forbid_filter_logwrite = true
	forbid_filter_perl = true
	forbid_filter_readsocket = true
	forbid_filter_run = true
	file_transport = dummy
	directory_transport = dummy
	pipe_transport = dummy
	reply_transport = dummy:>)

## Transports for redirection filters.
m4_define(<:FILTER_TRANSPORTS:>,
	<:file_transport = mailbox
	directory_transport = maildir
	pipe_transport = pipe
	reply_transport = reply:>)

m4_define(<:FILTER_ROUTER:>,
<:$1_vrf:
	$2
	FILTER_VERIFY<::>$3
$1:
	$2
	verify = no
	FILTER_TRANSPORTS<::>$4:>)

DIVERT(null)
###--------------------------------------------------------------------------
### Some standard transports.

m4_define(<:USER_DELIVERY:>,
	<:delivery_date_add = true
	envelope_to_add = true
	return_path_add = true:>)

SECTION(transports)m4_dnl
## A standard transport for remote delivery.  Try to do TLS, and don't worry
## too much if it's not very secure: the alternative is sending in plaintext
## anyway.
smtp:
	driver = smtp
	tls_require_ciphers = CONF_acceptable_ciphers
	tls_dh_min_bits = 1020
	tls_tempfail_tryclear = true

## Transport to a local SMTP server; use TLS and perform client
## authentication.
smtp_local:
	driver = smtp
	hosts_require_tls = *
	tls_certificate = CONF_sysconf_dir/client.cert
	tls_privatekey = CONF_sysconf_dir/client.key
	tls_verify_certificates = CONF_ca_dir/ca.cert
	tls_require_ciphers = CONF_good_ciphers
	tls_dh_min_bits = 2046
	tls_tempfail_tryclear = false
	authenticated_sender = ${if def:authenticated_id \
				    {$authenticated_id@CONF_master_domain} \
				    fail}

## A standard transport for local delivery.
deliver:
	driver = appendfile
	file = /var/mail/$local_part
	group = mail
	mode = 0600
	mode_fail_narrower = false
	USER_DELIVERY

## Transports for user filters.
mailbox:
	driver = appendfile
	initgroups = true
	USER_DELIVERY

maildir:
	driver = appendfile
	maildir_format = true
	initgroups = true
	USER_DELIVERY

pipe:
	driver = pipe
	path = ${if and {{def:home} {exists{$home/bin}}} {$home/bin:} {}}\
		/usr/local/bin:/usr/local/sbin:\
		/usr/bin:/usr/sbin:/bin:/sbin
	initgroups = true
	umask = 002
	return_fail_output = true
	log_output = true

## A special dummy transport for use during address verification.
dummy:
	driver = appendfile
	file = /dev/null

DIVERT(null)
###--------------------------------------------------------------------------
### Retry configuration.

SECTION(retry, default)m4_dnl
## Default.
*					* \
	F,2h,15m; G,16h,2h,1.5; F,4d,6h

DIVERT(null)
###----- That's all, folks --------------------------------------------------
Commit	Line	Data
185b5456 MW	1	### --m4--
	2	###
	3	### Basic settings for distorted.org.uk Exim configuration
	4	###
	5	### (c) 2012 Mark Wooding
	6	###
	7
	8	###----- Licensing notice ---------------------------------------------------
	9	###
	10	### This program is free software; you can redistribute it and/or modify
	11	### it under the terms of the GNU General Public License as published by
	12	### the Free Software Foundation; either version 2 of the License, or
	13	### (at your option) any later version.
	14	###
	15	### This program is distributed in the hope that it will be useful,
	16	### but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	### GNU General Public License for more details.
	19	###
	20	### You should have received a copy of the GNU General Public License
	21	### along with this program; if not, write to the Free Software Foundation,
	22	### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	23
	24	###--------------------------------------------------------------------------
	25	### Global settings.
	26
	27	SECTION(global, priv)m4_dnl
b1d083dd	28	admin_groups = CONF_admin_groups
185b5456 MW	29	prod_requires_admin = false
	30
	31	SECTION(global, logging)m4_dnl
	32	log_file_path = : syslog
	33	log_selector = \
	34	+smtp_confirmation \
	35	+tls_peerdn
	36	log_timezone = true
	37	syslog_duplication = false
	38	syslog_timestamp = false
	39
	40	SECTION(global, daemon)m4_dnl
	41	local_interfaces = <; CONF_interfaces
	42	extra_local_interfaces = <; 0.0.0.0 ; ::
	43
	44	SECTION(global, resource)m4_dnl
	45	deliver_queue_load_max = 8
	46	queue_only_load = 12
	47	smtp_accept_max = 16
	48	smtp_accept_queue = 32
	49	smtp_accept_reserve = 4
	50	smtp_load_reserve = 10
	51	smtp_reserve_hosts = +trusted
	52
	53	SECTION(global, policy)m4_dnl
	54	host_lookup = *
	55
	56	SECTION(global, users)m4_dnl
	57	gecos_name = $1
	58	gecos_pattern = ([^,:]*)
	59
	60	SECTION(global, incoming)m4_dnl
	61	received_header_text = Received: \
2cf9db84	62	${if def:sender_rcvhost \
9384ef4f	63	{from $sender_rcvhost\n\t} \
2cf9db84 MW	64	{${if def:sender_ident \
2cf9db84 MW	65	{from ${quote_local_part:$sender_ident} }}}}\
185b5456	66	by $primary_hostname \
b92689d6 MW	67	(Exim $version_number)\
b92689d6 MW	68	${if def:tls_cipher {\n\t} { }}\
185b5456 MW	69	${if def:received_protocol \
185b5456 MW	70	{with $received_protocol \
b92689d6	71	${if def:tls_cipher {(cipher=$tls_cipher)}}}}\n\t\
185b5456	72	${if def:sender_address \
43e6fc69	73	{(envelope-from $sender_address\
185b5456 MW	74	${if def:authenticated_id \
	75	{; auth=$authenticated_id}})\n\t}}\
	76	id $message_exim_id\
	77	${if def:received_for {\n\tfor $received_for}}
	78
	79	SECTION(global, smtp)m4_dnl
	80	smtp_return_error_details = true
	81	accept_8bitmime = true
	82
	83	SECTION(global, process)m4_dnl
	84	extract_addresses_remove_arguments = false
	85	headers_charset = utf-8
	86	qualify_domain = CONF_master_domain
	87
	88	SECTION(global, bounce)m4_dnl
	89	delay_warning = 1h : 24h : 2d
	90
	91	DIVERT(null)
	92	###--------------------------------------------------------------------------
	93	### Access control lists.
	94
	95	SECTION(global, acl-after)
	96	SECTION(global, acl)m4_dnl
	97	acl_smtp_helo = helo
	98	SECTION(acl, misc)m4_dnl
	99	helo:
fe8f2338 MW	100	## Check that the caller's claimed identity is actually plausible.
	101	## This seems like it's a fairly effective filter on spamminess, but
	102	## it's too blunt a tool. Rather than reject, add a warning header.
	103	## Only we can't do this the easy way, so save it up for use in MAIL.
	104	## Also, we're liable to get a subsequent HELO (e.g., after STARTTLS)
	105	## and we should only care about the most recent one.
	106	warn set acl_c_helo_warning = false
	107	!condition = \
	108	${if exists {CONF_sysconf_dir/helo.conf} \
	109	{${lookup {$sender_helo_name} \
	110	partial0-lsearch \
	111	{CONF_sysconf_dir/helo.conf} \
	112	{${if match_ip \
	113	{$sender_host_address} \
	114	{$value}}}}}}
	115	!verify = helo
	116	set acl_c_helo_warning = true
185b5456 MW	117
	118	accept
	119
284c9d7e MW	120	SECTION(global, acl)m4_dnl
	121	acl_not_smtp_start = not_smtp_start
	122	SECTION(acl, misc)m4_dnl
	123	not_smtp_start:
	124	## Record the user's name.
	125	warn set acl_c_user = $sender_ident
	126
	127	## Done.
	128	accept
	129
185b5456 MW	130	SECTION(global, acl)m4_dnl
	131	acl_smtp_mail = mail
	132	SECTION(acl, mail)m4_dnl
	133	mail:
	134
fe8f2338 MW	135	## If we stashed a warning header about HELO from earlier, we should
	136	## add it now.
	137	warn condition = $acl_c_helo_warning
	138	add_header = :after_received:X-Distorted-Warning: \
	139	BADHELO \
	140	Client's HELO doesn't match its IP address.\n\t\
d70f6d53 MW	141	HELO name=$sender_helo_name, \
d70f6d53 MW	142	address=$sender_host_address
fe8f2338	143
185b5456 MW	144	## Always allow the empty sender, so that we can receive bounces.
	145	accept senders = :
	146
	147	## Ensure that the sender is routable. This is important to prevent
	148	## undeliverable bounces.
	149	require message = Invalid sender; \
	150	($sender_verify_failure; $acl_verify_message)
	151	verify = sender
	152
	153	## If this is directly from a client then hack on it for a while.
	154	warn condition = ${if eq{$acl_c_mode}{submission}}
	155	control = submission
	156
284c9d7e MW	157	## Insist that a local client connect through TLS.
	158	deny message = Hosts within CONF_master_domain must use TLS
	159	!condition = ${if eq{$acl_c_mode}{submission}}
	160	hosts = +allnets
	161	!encrypted = *
	162
	163	## Check that a submitted message's sender address is allowable.
	164	require acl = mail_check_auth
	165
185b5456 MW	166	SECTION(acl, mail-tail)m4_dnl
	167	## And we're done.
	168	accept
	169
	170	SECTION(global, acl)m4_dnl
	171	acl_smtp_connect = connect
	172	SECTION(acl, connect)m4_dnl
	173	connect:
	174	SECTION(acl, connect-tail)m4_dnl
e12c9586	175	## Configure variables according to the submission mode.
185b5456	176	warn acl = check_submission
e12c9586 MW	177
e12c9586 MW	178	## Done.
185b5456 MW	179	accept
	180
	181	check_submission:
	182	## See whether this message needs hacking on.
	183	accept !hosts = +localnet
	184	!condition = ${if ={$received_port}{CONF_submission_port}}
	185	set acl_c_mode = relay
	186
	187	## Remember to apply submission controls.
	188	warn set acl_c_mode = submission
	189
	190	## Done.
	191	accept
	192
	193	SECTION(global, acl)m4_dnl
	194	acl_smtp_rcpt = rcpt
	195	SECTION(acl, rcpt)m4_dnl
	196	rcpt:
	197
	198	## Reject if the client isn't allowed to relay and the recipient
	199	## isn't in one of our known domains.
	200	deny message = Relaying not permitted
	201	!hosts = CONF_relay_clients
	202	!authenticated = *
	203	!domains = +known
	204
	205	## Ensure that the recipient is routable.
	206	require message = Invalid recipient \
	207	($recipient_verify_failure; $acl_verify_message)
	208	verify = recipient
	209
	210	SECTION(acl, rcpt-tail)m4_dnl
	211	## Everything checks out OK: let this one go through.
	212	accept
	213
	214	SECTION(global, acl)m4_dnl
	215	acl_smtp_data = data
	216	SECTION(acl, data)m4_dnl
	217	data:
	218
	219	SECTION(acl, data-tail)m4_dnl
	220	accept
	221
	222	SECTION(global, acl)m4_dnl
	223	acl_smtp_expn = expn_vrfy
	224	acl_smtp_vrfy = expn_vrfy
	225	SECTION(acl)m4_dnl
	226	expn_vrfy:
	227	accept hosts = +trusted
	228	deny message = Suck it and see
	229
	230	DIVERT(null)
	231	###--------------------------------------------------------------------------
284c9d7e MW	232	### Verification of sender address.
	233
	234	SECTION(acl, misc)m4_dnl
	235	mail_check_auth:
	236
	237	## If this isn't a submission then it doesn't need checking.
	238	accept condition = ${if !eq{$acl_c_mode}{submission}}
	239
	240	## If the caller hasn't formally authenticated, but this is a
	241	## loopback connection, then we can trust identd to tell us the right
	242	## answer. So we should stash the right name somewhere consistent.
	243	warn set acl_c_user = $authenticated_id
	244	hosts = +localnet
	245	!authenticated = *
	246	set acl_c_user = $sender_ident
	247
	248	## User must be authenticated.
	249	deny message = Sender not authenticated
	250	!hosts = +localnet
	251	!authenticated = *
	252
	253	## Make sure that the local part is one that the authenticated sender
	254	## is allowed to claim.
	255	deny message = Sender address forbidden to calling user
	256	!condition = ${LOOKUP_DOMAIN($sender_address_domain,
	257	{${if and {{match_local_part \
	258	{$acl_c_user} \
	259	{+dom_users}} \
	260	{match_local_part \
	261	{$sender_address_local_part} \
	262	{+dom_locals}}}}},
	263	{${if and {{match_local_part \
	264	{$sender_address_local_part} \
	265	{+user_extaddr}} \
	266	{or {{eq {$sender_address_domain} \
	267	{}} \
	268	{match_domain \
	269	{$sender_address_domain} \
	270	{+public}}}}}}})}
	271
	272	## All done.
	273	accept
	274
	275	DIVERT(null)
	276	###--------------------------------------------------------------------------
185b5456 MW	277	### Common options for forwarding routers.
	278
	279	## We're pretty permissive here.
	280	m4_define(<:FILTER_BASE:>,
	281	<:driver = redirect
	282	modemask = 002
	283	check_owner = false
	284	check_group = false
	285	allow_filter = true
	286	allow_defer = true
	287	allow_fail = true
	288	forbid_blackhole = false
	289	check_ancestor = true:>)
	290
	291	## Common options for forwarding routers at verification time.
	292	m4_define(<:FILTER_VERIFY:>,
	293	<:verify_only = true
	294	user = CONF_filter_user
	295	forbid_filter_dlfunc = true
	296	forbid_filter_logwrite = true
	297	forbid_filter_perl = true
	298	forbid_filter_readsocket = true
	299	forbid_filter_run = true
	300	file_transport = dummy
	301	directory_transport = dummy
	302	pipe_transport = dummy
	303	reply_transport = dummy:>)
	304
	305	## Transports for redirection filters.
	306	m4_define(<:FILTER_TRANSPORTS:>,
7ab75d6f	307	<:file_transport = mailbox
185b5456 MW	308	directory_transport = maildir
	309	pipe_transport = pipe
	310	reply_transport = reply:>)
	311
7ab75d6f MW	312	m4_define(<:FILTER_ROUTER:>,
	313	<:$1_vrf:
	314	$2
	315	FILTER_VERIFY<::>$3
	316	$1:
	317	$2
	318	verify = no
	319	FILTER_TRANSPORTS<::>$4:>)
	320
185b5456 MW	321	DIVERT(null)
	322	###--------------------------------------------------------------------------
	323	### Some standard transports.
	324
	325	m4_define(<:USER_DELIVERY:>,
	326	<:delivery_date_add = true
	327	envelope_to_add = true
	328	return_path_add = true:>)
	329
	330	SECTION(transports)m4_dnl
	331	## A standard transport for remote delivery. Try to do TLS, and don't worry
	332	## too much if it's not very secure: the alternative is sending in plaintext
	333	## anyway.
	334	smtp:
	335	driver = smtp
	336	tls_require_ciphers = CONF_acceptable_ciphers
	337	tls_dh_min_bits = 1020
	338	tls_tempfail_tryclear = true
	339
	340	## Transport to a local SMTP server; use TLS and perform client
	341	## authentication.
	342	smtp_local:
	343	driver = smtp
	344	hosts_require_tls = *
	345	tls_certificate = CONF_sysconf_dir/client.cert
	346	tls_privatekey = CONF_sysconf_dir/client.key
	347	tls_verify_certificates = CONF_ca_dir/ca.cert
	348	tls_require_ciphers = CONF_good_ciphers
b6d74252	349	tls_dh_min_bits = 2046
185b5456 MW	350	tls_tempfail_tryclear = false
185b5456 MW	351	authenticated_sender = ${if def:authenticated_id \
0bed9b7f	352	{$authenticated_id@CONF_master_domain} \
185b5456 MW	353	fail}
	354
	355	## A standard transport for local delivery.
	356	deliver:
	357	driver = appendfile
	358	file = /var/mail/$local_part
8f6af4ae MW	359	group = mail
	360	mode = 0600
	361	mode_fail_narrower = false
185b5456 MW	362	USER_DELIVERY
	363
	364	## Transports for user filters.
	365	mailbox:
	366	driver = appendfile
8f6af4ae	367	initgroups = true
185b5456 MW	368	USER_DELIVERY
	369
	370	maildir:
	371	driver = appendfile
	372	maildir_format = true
8f6af4ae	373	initgroups = true
185b5456 MW	374	USER_DELIVERY
	375
	376	pipe:
	377	driver = pipe
8f6af4ae MW	378	path = ${if and {{def:home} {exists{$home/bin}}} {$home/bin:} {}}\
	379	/usr/local/bin:/usr/local/sbin:\
	380	/usr/bin:/usr/sbin:/bin:/sbin
	381	initgroups = true
	382	umask = 002
	383	return_fail_output = true
	384	log_output = true
185b5456 MW	385
	386	## A special dummy transport for use during address verification.
	387	dummy:
	388	driver = appendfile
	389	file = /dev/null
	390
	391	DIVERT(null)
	392	###--------------------------------------------------------------------------
	393	### Retry configuration.
	394
	395	SECTION(retry, default)m4_dnl
	396	## Default.
	397	* * \
	398	F,2h,15m; G,16h,2h,1.5; F,4d,6h
	399
	400	DIVERT(null)
	401	###----- That's all, folks --------------------------------------------------