3 ### Transmission to remote hosts for distorted.org.uk Exim configuration.
5 ### (c) 2012 Mark Wooding
8 ###----- Licensing notice ---------------------------------------------------
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.
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.
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.
24 ###--------------------------------------------------------------------------
25 ### Listen for incoming connections.
27 SECTION(global, tls)m4_dnl
28 tls_certificate = CONF_sysconf_dir/server.cert
29 tls_privatekey = CONF_sysconf_dir/server.key
30 tls_advertise_hosts = *
31 tls_dhparam = CONF_ca_dir/dh-param.pem
32 tls_require_ciphers = ${if or {{={$received_port}{CONF_submission_port}} \
33 {match_ip {$sender_host_address}{+trusted}}} \
35 {CONF_acceptable_ciphers}}
36 tls_verify_certificates = CONF_ca_dir/ca.cert
37 tls_verify_hosts = ${if eq{$acl_c_mode}{submission} {} {+allnets}}
40 ###--------------------------------------------------------------------------
41 ### Check source addresses for apparently local senders.
43 SECTION(acl, mail-hooks)m4_dnl
44 ## Check that a submitted message's sender address is allowable.
45 require acl = mail_client_addr
47 ## Insist that a local client connect through TLS.
48 deny message = Hosts within CONF_master_domain must use TLS
49 !condition = ${if eq{$acl_c_mode}{submission}}
53 SECTION(acl, misc)m4_dnl
56 ## If this is a message submission then that's handled elsewhere.
57 accept condition = ${if eq{$acl_c_mode}{submission}}
59 ## Make sure that the sender matches the client address. I feel like
60 ## I want to reject these, but that will break stuff. For example,
61 ## if I send mail to an externally hosted address which is really a
62 ## distribution list containing some local address, then we'll
63 ## (approximately legitimately) receive mail with an apparently-local
64 ## sender from a remote host.
65 warn !hosts = ${LOOKUP_DOMAIN($sender_address_domain,
66 {KV(hosts, {$value}{+allnets})},
67 {${if match_domain {$sender_address_domain} \
69 {+allnets}{! +allnets}}})}
70 add_header = :after_received:X-Distorted-Warning: \
72 Apparently local sender, but received from remote \
79 ###--------------------------------------------------------------------------
80 ### The obvious trivial router.
82 SECTION(routers, remote)m4_dnl
83 ## Send mail on to a host in our own network. We must apply extra security.
86 domains = ! +known : *.CONF_master_domain
88 transport = smtp_local
91 ## Send mail on to unknown hosts.
100 ###----- That's all, folks --------------------------------------------------