3 ### Basic settings 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 ###--------------------------------------------------------------------------
27 SECTION(global, priv)m4_dnl
28 admin_groups = CONF_admin_groups
29 prod_requires_admin = false
31 SECTION(global, logging)m4_dnl
32 log_file_path = : syslog
37 syslog_duplication = false
38 syslog_timestamp = false
40 SECTION(global, daemon)m4_dnl
41 local_interfaces = <; CONF_interfaces
42 extra_local_interfaces = <; 0.0.0.0 ; ::
44 SECTION(global, resource)m4_dnl
45 deliver_queue_load_max = 8
48 smtp_accept_queue = 32
49 smtp_accept_reserve = 4
50 smtp_load_reserve = 10
51 smtp_reserve_hosts = +trusted
53 SECTION(global, policy)m4_dnl
56 SECTION(global, users)m4_dnl
58 gecos_pattern = ([^,:]*)
60 SECTION(global, incoming)m4_dnl
61 received_header_text = Received: \
62 ${if def:sender_rcvhost \
63 {from $sender_rcvhost\
64 ${if def:sender_helo_name \
65 { (helo=$sender_helo_name)}}\n\t} \
66 {${if def:sender_ident \
67 {from ${quote_local_part:$sender_ident} }}}}\
68 by $primary_hostname \
69 (Exim $version_number)\
70 ${if def:tls_cipher {\n\t} { }}\
71 ${if def:received_protocol \
72 {with $received_protocol \
73 ${if def:tls_cipher {(cipher=$tls_cipher)}}}}\n\t\
74 ${if def:sender_address \
75 {(envelope-from <$sender_address>\
76 ${if def:authenticated_id \
77 {; auth=$authenticated_id}})\n\t}}\
79 ${if def:received_for {\n\tfor $received_for}}
81 SECTION(global, smtp)m4_dnl
82 smtp_return_error_details = true
83 accept_8bitmime = true
85 SECTION(global, process)m4_dnl
86 extract_addresses_remove_arguments = false
87 headers_charset = utf-8
88 qualify_domain = CONF_master_domain
90 SECTION(global, bounce)m4_dnl
91 delay_warning = 1h : 24h : 2d
94 ###--------------------------------------------------------------------------
95 ### Access control lists.
97 SECTION(global, acl-after)
98 SECTION(global, acl)m4_dnl
100 SECTION(acl, misc)m4_dnl
102 ## Check that the caller's claimed identity is actually plausible.
103 ## This seems like it's a fairly effective filter on spamminess, but
104 ## it's too blunt a tool. Rather than reject, add a warning header.
105 ## Only we can't do this the easy way, so save it up for use in MAIL.
106 ## Also, we're liable to get a subsequent HELO (e.g., after STARTTLS)
107 ## and we should only care about the most recent one.
108 warn set acl_c_helo_warning = false
110 ${if exists {CONF_sysconf_dir/helo.conf} \
111 {${lookup {$sender_helo_name} \
113 {CONF_sysconf_dir/helo.conf} \
115 {$sender_host_address} \
118 set acl_c_helo_warning = true
122 SECTION(global, acl)m4_dnl
124 SECTION(acl, mail)m4_dnl
127 ## If we stashed a warning header about HELO from earlier, we should
129 warn condition = $acl_c_helo_warning
130 add_header = :after_received:X-Distorted-Warning: \
132 Client's HELO doesn't match its IP address.\n\t\
133 HELO name = $sender_helo_name, \
134 address = $sender_host_address
136 ## Always allow the empty sender, so that we can receive bounces.
139 ## Ensure that the sender is routable. This is important to prevent
140 ## undeliverable bounces.
141 require message = Invalid sender; \
142 ($sender_verify_failure; $acl_verify_message)
145 ## If this is directly from a client then hack on it for a while.
146 warn condition = ${if eq{$acl_c_mode}{submission}}
149 SECTION(acl, mail-tail)m4_dnl
153 SECTION(global, acl)m4_dnl
154 acl_smtp_connect = connect
155 SECTION(acl, connect)m4_dnl
157 SECTION(acl, connect-tail)m4_dnl
158 ## Configure variables according to the submission mode.
159 warn acl = check_submission
165 ## See whether this message needs hacking on.
166 accept !hosts = +localnet
167 !condition = ${if ={$received_port}{CONF_submission_port}}
168 set acl_c_mode = relay
170 ## Remember to apply submission controls.
171 warn set acl_c_mode = submission
176 SECTION(global, acl)m4_dnl
178 SECTION(acl, rcpt)m4_dnl
181 ## Reject if the client isn't allowed to relay and the recipient
182 ## isn't in one of our known domains.
183 deny message = Relaying not permitted
184 !hosts = CONF_relay_clients
188 ## Ensure that the recipient is routable.
189 require message = Invalid recipient \
190 ($recipient_verify_failure; $acl_verify_message)
193 SECTION(acl, rcpt-tail)m4_dnl
194 ## Everything checks out OK: let this one go through.
197 SECTION(global, acl)m4_dnl
199 SECTION(acl, data)m4_dnl
202 SECTION(acl, data-tail)m4_dnl
205 SECTION(global, acl)m4_dnl
206 acl_smtp_expn = expn_vrfy
207 acl_smtp_vrfy = expn_vrfy
210 accept hosts = +trusted
211 deny message = Suck it and see
214 ###--------------------------------------------------------------------------
215 ### Common options for forwarding routers.
217 ## We're pretty permissive here.
218 m4_define(<:FILTER_BASE:>,
226 forbid_blackhole = false
227 check_ancestor = true:>)
229 ## Common options for forwarding routers at verification time.
230 m4_define(<:FILTER_VERIFY:>,
232 user = CONF_filter_user
233 forbid_filter_dlfunc = true
234 forbid_filter_logwrite = true
235 forbid_filter_perl = true
236 forbid_filter_readsocket = true
237 forbid_filter_run = true
238 file_transport = dummy
239 directory_transport = dummy
240 pipe_transport = dummy
241 reply_transport = dummy:>)
243 ## Transports for redirection filters.
244 m4_define(<:FILTER_TRANSPORTS:>,
246 file_transport = mailbox
247 directory_transport = maildir
248 pipe_transport = pipe
249 reply_transport = reply:>)
252 ###--------------------------------------------------------------------------
253 ### Some standard transports.
255 m4_define(<:USER_DELIVERY:>,
256 <:delivery_date_add = true
257 envelope_to_add = true
258 return_path_add = true:>)
260 SECTION(transports)m4_dnl
261 ## A standard transport for remote delivery. Try to do TLS, and don't worry
262 ## too much if it's not very secure: the alternative is sending in plaintext
266 tls_require_ciphers = CONF_acceptable_ciphers
267 tls_dh_min_bits = 1020
268 tls_tempfail_tryclear = true
270 ## Transport to a local SMTP server; use TLS and perform client
274 hosts_require_tls = *
275 tls_certificate = CONF_sysconf_dir/client.cert
276 tls_privatekey = CONF_sysconf_dir/client.key
277 tls_verify_certificates = CONF_ca_dir/ca.cert
278 tls_require_ciphers = CONF_good_ciphers
279 tls_dh_min_bits = 2046
280 tls_tempfail_tryclear = false
281 authenticated_sender = ${if def:authenticated_id \
282 {$authenticated_id@CONF_master_domain} \
285 ## A standard transport for local delivery.
288 file = /var/mail/$local_part
291 mode_fail_narrower = false
294 ## Transports for user filters.
302 maildir_format = true
308 path = ${if and {{def:home} {exists{$home/bin}}} {$home/bin:} {}}\
309 /usr/local/bin:/usr/local/sbin:\
310 /usr/bin:/usr/sbin:/bin:/sbin
313 return_fail_output = true
316 ## A special dummy transport for use during address verification.
322 ###--------------------------------------------------------------------------
323 ### Retry configuration.
325 SECTION(retry, default)m4_dnl
328 F,2h,15m; G,16h,2h,1.5; F,4d,6h
331 ###----- That's all, folks --------------------------------------------------