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185b5456 MW |
1 | ### -*-m4-*- |
2 | ### | |
3 | ### Transmission to remote hosts 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 | ### Listen for incoming connections. | |
26 | ||
d411be33 MW |
27 | SECTION(global, daemon)m4_dnl |
28 | daemon_smtp_ports = CONF_smtp_port : CONF_submission_port | |
29 | ||
185b5456 MW |
30 | DIVERT(null) |
31 | ###-------------------------------------------------------------------------- | |
32 | ### Check source addresses for apparently local senders. | |
33 | ||
34 | SECTION(acl, mail-hooks)m4_dnl | |
35 | ## Check that a submitted message's sender address is allowable. | |
36 | require acl = mail_client_addr | |
37 | ||
185b5456 MW |
38 | SECTION(acl, misc)m4_dnl |
39 | mail_client_addr: | |
40 | ||
41 | ## If this is a message submission then that's handled elsewhere. | |
42 | accept condition = ${if eq{$acl_c_mode}{submission}} | |
43 | ||
fd37fad5 MW |
44 | ## Make sure that the sender matches the client address. I feel like |
45 | ## I want to reject these, but that will break stuff. For example, | |
46 | ## if I send mail to an externally hosted address which is really a | |
47 | ## distribution list containing some local address, then we'll | |
48 | ## (approximately legitimately) receive mail with an apparently-local | |
49 | ## sender from a remote host. | |
50 | warn !hosts = ${LOOKUP_DOMAIN($sender_address_domain, | |
185b5456 MW |
51 | {KV(hosts, {$value}{+allnets})}, |
52 | {${if match_domain {$sender_address_domain} \ | |
53 | {+public} \ | |
54 | {+allnets}{! +allnets}}})} | |
fd37fad5 MW |
55 | add_header = :after_received:X-Distorted-Warning: \ |
56 | RCLNTLSNDR \ | |
57 | Apparently local sender, but received from remote \ | |
c1709c7f | 58 | server.\n\t\ |
60c96a7c | 59 | sender=$sender_address \ |
c1709c7f | 60 | host=$sender_host_address |
185b5456 MW |
61 | |
62 | ## OK. | |
63 | accept | |
64 | ||
65 | DIVERT(null) | |
66 | ###-------------------------------------------------------------------------- | |
67 | ### The obvious trivial router. | |
68 | ||
69 | SECTION(routers, remote)m4_dnl | |
70 | ## Send mail on to a host in our own network. We must apply extra security. | |
71 | local: | |
72 | driver = dnslookup | |
e913c999 | 73 | domains = ! +known : CONF_master_domain : *.CONF_master_domain |
185b5456 MW |
74 | self = fail |
75 | transport = smtp_local | |
76 | no_more | |
77 | ||
78 | ## Send mail on to unknown hosts. | |
79 | remote: | |
80 | driver = dnslookup | |
81 | domains = ! +known | |
82 | self = fail | |
83 | transport = smtp | |
84 | no_more | |
85 | ||
86 | DIVERT(null) | |
87 | ###----- That's all, folks -------------------------------------------------- |