~mdw / exim-config / blame
| Commit | Line | Data |
|---|---|---|
| 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 {$sender_address_domain} \ | |
| 53 | {+public} \ | |
| 54 | {+allnets}{! +allnets}}})} | |
| 1e5ccd7c | 55 | ADD_HEADER(<:X-CONF_header_token-Warning: \ |
| fd37fad5 MW |
56 | RCLNTLSNDR \ |
| 57 | Apparently local sender, but received from remote \ | |
| c1709c7f | 58 | server.\n\t\ |
| 60c96a7c | 59 | sender=$sender_address \ |
| 1e5ccd7c | 60 | host=$sender_host_address:>) |
| 185b5456 MW |
61 | |
| 62 | ## OK. | |
| 63 | accept | |
| 64 | ||
| 9a361f76 MW |
65 | DIVERT(null) |
| 66 | ###-------------------------------------------------------------------------- | |
| 67 | ### Rename locally-meaningful headers in mail from outside. | |
| 68 | ||
| 69 | m4_define(<:DISTORTED_HEADERS:>, | |
| 70 | <:X-CONF_header_token-Warning, | |
| 71 | X-CONF_header_token-SpamAssassin-Score, | |
| 72 | X-CONF_header_token-SpamAssassin-Status:>) | |
| 73 | ||
| 74 | SECTION(acl, data)m4_dnl | |
| 75 | ## If this message is coming from outside then rename headers which | |
| 76 | ## look like the ones we're likely to add. This is most relevant for | |
| 77 | ## our spam-report headers, because I'm not sure I understand why | |
| 78 | ## someone would want to fake an X-Distorted-Warning header. | |
| 79 | warn !condition = ${if eq{$acl_c_mode}{submission}} | |
| 80 | !hosts = +allnets | |
| 81 | set acl_m_hdradd = ${if def:acl_m_hdradd{$acl_m_hdradd}}\ | |
| 82 | RENAME_HEADERS_ADD(<:DISTORTED_HEADERS:>) | |
| 83 | set acl_m_hdrrm = ${if def:acl_m_hdrrm{$acl_m_hdrrm:}}\ | |
| 84 | RENAME_HEADERS_REMOVE(<:DISTORTED_HEADERS:>) | |
| 85 | ||
| 185b5456 MW |
86 | DIVERT(null) |
| 87 | ###-------------------------------------------------------------------------- | |
| 88 | ### The obvious trivial router. | |
| 89 | ||
| 90 | SECTION(routers, remote)m4_dnl | |
| 91 | ## Send mail on to a host in our own network. We must apply extra security. | |
| 92 | local: | |
| 93 | driver = dnslookup | |
| 4806403d MW |
94 | domains = ${if bool {${LOOKUP_DOMAIN($domain, |
| 95 | {KV(service, {$value}{true})}, | |
| 96 | {false})}} \ | |
| 97 | {}{ ! +public : \ | |
| 98 | CONF_master_domain : \ | |
| 99 | *.CONF_master_domain }} | |
| 185b5456 MW |
100 | self = fail |
| 101 | transport = smtp_local | |
| 102 | no_more | |
| 103 | ||
| 104 | ## Send mail on to unknown hosts. | |
| 105 | remote: | |
| 106 | driver = dnslookup | |
| 4806403d MW |
107 | domains = ${if bool {${LOOKUP_DOMAIN($domain, |
| 108 | {KV(service, {$value}{true})}, | |
| 109 | {false})}} \ | |
| 110 | {}{ ! +public }} | |
| 185b5456 MW |
111 | self = fail |
| 112 | transport = smtp | |
| 113 | no_more | |
| 114 | ||
| 115 | DIVERT(null) | |
| 116 | ###----- That's all, folks -------------------------------------------------- |