X-Git-Url: https://git.distorted.org.uk/~mdw/exim-config/blobdiff_plain/284c9d7ee4b07b87c8db9e85ae3e16511d3b6798..534d411b5c96107030e30da491e06734ea09a7b3:/base.m4

diff --git a/base.m4 b/base.m4
index ac6b95c..204be0a 100644
--- a/base.m4
+++ b/base.m4
@@ -60,9 +60,7 @@ gecos_pattern = ([^,:]*)
 SECTION(global, incoming)m4_dnl
 received_header_text = Received: \
 	${if def:sender_rcvhost \
-	     {from $sender_rcvhost\
-	      ${if def:sender_helo_name \
-		   { (helo=$sender_helo_name)}}\n\t} \
+	     {from $sender_rcvhost\n\t} \
 	     {${if def:sender_ident \
 		   {from ${quote_local_part:$sender_ident} }}}}\
 	by $primary_hostname \
@@ -90,6 +88,18 @@ qualify_domain = CONF_master_domain
 SECTION(global, bounce)m4_dnl
 delay_warning = 1h : 24h : 2d
 
+SECTION(global, tls)m4_dnl
+tls_certificate = CONF_sysconf_dir/server.cert
+tls_privatekey = CONF_sysconf_dir/server.key
+tls_advertise_hosts = ${if exists {CONF_sysconf_dir/server.key} {*}{}}
+tls_dhparam = CONF_ca_dir/dh-param-2048.pem
+tls_require_ciphers = ${if or {{={$received_port}{CONF_submission_port}} \
+			       {match_ip {$sender_host_address}{+trusted}}} \
+			   {CONF_good_ciphers} \
+			   {CONF_acceptable_ciphers}}
+tls_verify_certificates = CONF_ca_dir/ca.cert
+tls_verify_hosts = ${if eq{$acl_c_mode}{submission} {} {+allnets}}
+
 DIVERT(null)
 ###--------------------------------------------------------------------------
 ### Access control lists.
@@ -107,6 +117,11 @@ helo:
 	## and we should only care about the most recent one.
 	warn	 set acl_c_helo_warning = false
 		!condition = \
+			${if and {{match_ip {$sender_host_address} \
+					    {<; 127.0.0.0/8 ; ::1}} \
+				  {match_domain {$sender_helo_name} \
+						{localhost : +thishost}}}}
+		!condition = \
 			${if exists {CONF_sysconf_dir/helo.conf} \
 			     {${lookup {$sender_helo_name} \
 				       partial0-lsearch \
@@ -140,7 +155,7 @@ mail:
 		 add_header = :after_received:X-Distorted-Warning: \
 			BADHELO \
 			Client's HELO doesn't match its IP address.\n\t\
-			HELO name=$sender_helo_name, \
+			helo-name=$sender_helo_name \
 			address=$sender_host_address
 
 	## Always allow the empty sender, so that we can receive bounces.
@@ -182,7 +197,7 @@ SECTION(acl, connect-tail)m4_dnl
 
 check_submission:
 	## See whether this message needs hacking on.
-	accept	!hosts = +localnet
+	accept	!hosts = +thishost
 		!condition = ${if ={$received_port}{CONF_submission_port}}
 		 set acl_c_mode = relay
 
@@ -243,13 +258,13 @@ mail_check_auth:
 	## 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
+		 hosts = +thishost
 		!authenticated = *
 		 set acl_c_user = $sender_ident
 
 	## User must be authenticated.
 	deny	 message = Sender not authenticated
-		!hosts = +localnet
+		!hosts = +thishost
 		!authenticated = *
 
 	## Make sure that the local part is one that the authenticated sender
@@ -330,15 +345,42 @@ m4_define(<:USER_DELIVERY:>,
 	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.
+## A standard transport for remote delivery.  By default, try to do TLS, and
+## don't worry too much if it's not very secure: the alternative is sending
+## in plaintext anyway.  But all of this can be overridden from the
+## `domains.conf' file.  Annoyingly, the `tls_dh_min_bits' setting isn't
+## expanded before use, so we can't set it the obvious way.  Instead, encode
+## it into the transport name.  This is very unpleasant, of course.
 smtp:
 	driver = smtp
 	tls_require_ciphers = CONF_acceptable_ciphers
 	tls_dh_min_bits = 1020
 	tls_tempfail_tryclear = true
 
+m4_define(<:SMTP_TRANS_DHBITS:>,
+	<:driver = smtp
+	hosts_try_auth = *
+	hosts_require_tls = DOMKV(tls-peer-ca, {*}{})
+	hosts_require_auth = \
+		${if bool {DOMKV(require-auth, {$value}{false})} {*}{}}
+	tls_certificate = DOMKV(tls-certificate, {${expand:$value}}fail)
+	tls_privatekey = DOMKV(tls-private-key, {${expand:$value}}fail)
+	tls_verify_certificates = DOMKV(tls-peer-ca, {${expand:$value}}fail)
+	tls_require_ciphers = \
+		DOMKV(tls-ciphers,
+		      {${extract {${expand:$value}} \
+				 { good = CONF_good_ciphers \
+				   any = CONF_acceptable_ciphers } \
+				 {$value} \
+				 {${expand:$value}}}} \
+		      {CONF_acceptable_ciphers})
+	tls_dh_min_bits = $1
+	tls_tempfail_tryclear = true:>)m4_dnl
+smtp_dhbits_1024:
+	SMTP_TRANS_DHBITS(1020)
+smtp_dhbits_2048:
+	SMTP_TRANS_DHBITS(2046)
+
 ## Transport to a local SMTP server; use TLS and perform client
 ## authentication.
 smtp_local: