LISTS OF EXIM OPTIONS
---------------------
This file contains an almost complete lists of four kinds of Exim option:
1. Those that can appear in the run time configuration file;
2. Those that can be used on the command line;
3. Those that can appear in the build time configuration (Local/Makefile);
4. Those that can appear in the build time configuration for the Exim monitor
(Local/eximon.conf).
This file was last updated for Exim release 4.95.
1. RUN TIME OPTIONS
-------------------
As Exim has developed, new options have been added at each major release. For
the most part, backwards compatibility has been maintained, and obsolete
options continue to be recognized. However, incompatible changes took place at
releases 3.00, and 4.00. In both cases, several groups of options were
amalgamated into new, extended options, and obsolete options were removed.
The table below contains a complete list of all Exim's current options, along
with their types, default values, and where they can be used. String options
that are expanded before use are marked with *. Host lists, domain lists, and
address lists are always expanded. In some cases the defaults are not fixed
values, or not short enough to fit in the table. These are indicated by +. Some
other default values are determined when the Exim binary is compiled; these are
indicated by ++.
For options that are specific to a particular driver, the fourth column
contains the driver name, for example, appendfile. Otherwise, it contains
. `main' for options that appear in the main section of Exim's configuration
file;
. `authenticators' for generic options that apply to any authenticator;
. `routers' for generic options that apply to any router;
. `transports' for generic options that apply to any transport.
The fifth column contains the version of Exim in which the option was added, or
substantially changed. Where no number is given, the option has been in Exim
since the very early releases. The routers were completely reorganised for
release 4.00, and so no router options are shown as earlier than 4.00, though
in fact some of them were inherited from earlier versions.
-----------------------------------------------------------------------------------------
accept_8bitmime boolean true main 1.60 changed to true in 4.80
acl_not_smtp string* unset main 4.11
acl_not_smtp_mime string* unset main 4.51 with content scan
acl_smtp_atrn string* unset main 4.99+
acl_smtp_atrn string* unset main 4.99
acl_smtp_auth string* unset main 4.00
acl_smtp_connect string* unset main 4.11
acl_smtp_data string* unset main 4.00
acl_smtp_data_prdr string* unset main 4.82 with experimental_prdr, 4.83 unless disable_prdr
acl_smtp_dkim string* unset main 4.70 unless disable_dkim
acl_smtp_etrn string* unset main 4.00
acl_smtp_expn string* unset main 4.00
acl_smtp_helo string* unset main 4.20
acl_smtp_mail string* unset main 4.11
acl_smtp_mailauth string* unset main 4.21
acl_smtp_mime string* unset main 4.50 with content scan
acl_smtp_predata string* unset main 4.43
acl_smtp_quit string* unset main 4.43
acl_smtp_rcpt string* unset main 4.00
acl_smtp_starttls string* unset main 4.11
acl_smtp_vrfy string* unset main 4.00
address_data string* unset routers 4.00
address_retry_include_sender boolean true smtp 4.64
address_test boolean true routers 4.14
admin_groups string list unset main 3.02
allow_domain_literals boolean false main 4.00 replacing forbid_domain_literals
allow_commands string list* unset pipe 1.89
allow_defer boolean false redirect 4.00
allow_fail boolean false redirect 4.00
allow_filter boolean false redirect 4.00
allow_freeze boolean false redirect 4.00
allow_fifo boolean false appendfile 3.13
allow_insecure_tainted_data boolean true main 4.95 support will drop ~4.97ٍ
allow_localhost boolean false smtp 1.73
allow_mx_to_ip boolean false main 3.14
allow_symlink boolean false appendfile
allow_utf8_domains boolean false main 4.14
arc_sign string* unset smtp 4.91 with Experimental_ARC
auth_advertise_hosts host list "*" main 4.00
authenticated_sender string* unset smtp 4.14
authenticated_sender_force boolean false smtp 4.61
authenticate_hosts host list unset smtp 3.13
auto_thaw time 0s main
av_scanner string* + main 4.50 with content scan
batch_id string unset appendfile 4.00
unset lmtp 4.00
unset pipe 4.00
batch_max integer 100 appendfile
100 lmtp 3.20
100 pipe
bcc string* unset autoreply
bi_command string unset main
body_only boolean false transports 2.05
bounce_message_file string* unset main 4.00 expanded from 4.94
bounce_message_text string unset main 4.00
bounce_return_body boolean true main 4.23
bounce_return_message boolean true main 4.00
bounce_return_size_limit int 100K main 4.23 better name for return_size_limit
bounce_sender_authentication string unset main 4.00
callout_domain_negative_expire time 3h main 4.11
callout_domain_positive_expire time 7d main 4.11
callout_negative_expire time 2h main 4.11
callout_positive_expire time 24h main 4.11
callout_random_local_part string* + main 4.11
cannot_route_message string* unset routers 4.11
caseful_local_part boolean false routers 4.00
cc string* unset autoreply
check_ancestor boolean false redirect 4.00
check_group boolean false appendfile
+ redirect 4.00
check_local_user boolean false routers 4.00
check_log_inodes integer 0 main
check_log_space integer 0 main
check_owner boolean true appendfile 3.14
+ redirect 4.00
check_rfc2047_length boolean true main 4.60
check_secondary_mx boolean false dnslookup 4.00
check_spool_inodes integer 0 main
check_spool_space integer 0 main
check_string string "From " appendfile 3.03
unset pipe 3.03
check_srv string* unset dnslookup 4.31
client_authz string* unset gsasl 4.94
client_condition string* unset authenticators 4.68
client_ignore_invalid_base64 boolean false plaintext 4.61
client_name string* + cram_md5 3.10
client_password string* unset gsasl 4.94
client_secret string* unset cram_md5 3.10
client_send string* unset plaintext 3.10
unset external (auth) 4.93
client_username string* unset gsasl 4.94
command string* unset lmtp 3.20
unset pipe
unset queryprogram 4.00
command_group string unset queryprogram 4.00
command_timeout time 5m smtp
command_user string unset queryprogram 4.00
commandline_checks_require_admin boolean false main 4.90
condition string* unset routers 4.00
connect_timeout time 0s smtp 1.60
connection_max_messages integer 500 smtp 4.00 replaces batch_max
create_directory boolean true appendfile
create_file string "anywhere" appendfile
current_directory string unset transports 4.00
unset queryprogram 4.00
daemon_smtp_ports string unset main 1.75 pluralised in 4.21
daemon_startup_retries int 9 main 4.52
daemon_startup_sleep time 30s main 4.52
dane_require_tls_ciphers string* unset smtp 4.91
data string unset redirect 4.00
data_timeout time 5m smtp
debug_print string* unset authenticators 4.00
unset routers 4.00
unset transports 2.00
debug_store boolean false main 4.90
delay_after_cutoff boolean true smtp
delay_warning time list 24h main
delay_warning_condition string* + main 1.73
deliver_drop_privilege boolean false main 4.00
deliver_queue_load_max fixed-point unset main 1.70
delivery_date_add boolean false transports
delivery_date_remove boolean true main
dkim_canon string* unset smtp 4.70
dkim_domain string list* unset smtp 4.72
dkim_private_key string* unset smtp 4.70
dkim_selector string* unset smtp 4.70
dkim_sign_headers string* (RFC4871) smtp 4.70
dkim_strict string* unset smtp 4.70
dkim_timestamps integer* unset smtp 4.92
dkim_verify_hashes string sha256:sha512:sha1 main 4.93
dkim_verify_keytypes string ed25519:rsa main 4.93
dkim_verify_min_keysizes string list "rsa=1024 ed25519=250" main 4.94
dkim_verify_minimal boolean false main 4.93
dkim_verify_signers string* $dkim_signers main 4.70
directory string* unset appendfile
directory_file string* + appendfile
directory_mode octal-integer 0700 appendfile
directory_transport string* unset redirect 4.00
disable_ipv6 boolean false main 4.61
disable_logging boolean false routers 4.11
false transports 4.11
dmarc_forensic_sender string unset main 4.82 if experimental_dmarc, 4.93 mainline
dmarc_history_file string unset main 4.82 if experimental_dmarc, 4.93 mainline
dmarc_tld_file string unset main 4.82 if experimental_dmarc, 4.93 mainline
dns_again_means_nonexist domain list unset main 1.89
dns_check_names_pattern string + main 2.11
dns_cname_loops integer 0 main 4.92 Set to 9 for older behaviour
dns_csa_search_limit integer 5 main 4.60
dns_csa_use_reverse boolean true main 4.60
dns_dnssec_ok integer -1 main 4.82
dns_dane_ok integer -1 main 4.83
dns_ipv4_lookup boolean false main 3.20
dns_qualify_single boolean true smtp
dns_retrans time 0s main 1.60
dns_retry integer 0 main 1.60
dns_search_parents boolean false smtp
dns_use_edns0 integer -1 main 4.76
domains domain list unset routers 4.00
driver string unset authenticators
unset routers 4.00
unset transports
drop_cr boolean false main 4.00 became a no-op in 4.21
dscp string unset smtp 4.82
dsn_from string* + main 4.67
envelope_to_add boolean false transports
envelope_to_remove boolean true main
environment string* unset pipe 2.95
errors_copy string list* unset main
errors_reply_to string unset main
errors_to string* unset routers 4.00
escape_string string ">From " appendfile 3.03
unset pipe 3.03
exim_group string ++ main
exim_path string ++ main
exim_user string ++ main
exim_version string ++ main 4.93
expn boolean true routers
extra_local_interfaces string unset main 4.21
extract_addresses_remove_arguments boolean true main 1.92
fail_verify boolean false routers
fail_verify_recipient boolean false routers 4.00
fail_verify_sender boolean false routers 4.00
fallback_hosts string list unset routers 4.00
unset smtp
file string* unset appendfile
unset autoreply
unset redirect 4.00
file_expand boolean false autoreply
file_format string unset appendfile 3.03
file_must_exist boolean false appendfile
file_optional boolean false autoreply
file_transport string* unset redirect 4.00
filter_prepend_home boolean true redirect 4.63
final_timeout time 10m smtp
finduser_retries integer 0 main
forbid_blackhole boolean false redirect 4.00
forbid_exim_filter boolean false redirect 4.44
forbid_fail boolean false redirect 4.00
forbid_file boolean false redirect 4.00
forbid_filter_existstest boolean false redirect 4.00
forbid_filter_logwrite boolean false redirect 4.00
forbid_filter_lookup boolean false redirect 4.00
forbid_filter_perl boolean false redirect 4.00
forbid_filter_readfile boolean false redirect 4.00
forbid_filter_readsocket boolean false redirect 4.11
forbid_filter_reply boolean false redirect 4.00
forbid_filter_run boolean false redirect 4.00
forbid_include boolean false redirect 4.00
forbid_pipe boolean false redirect 4.00
forbid_sieve_filter boolean false redirect 4.44
forbid_smtp_code boolean false redirect 4.63
force_command boolean false pipe 4.82
freeze_exec_fail boolean false pipe 1.89
freeze_signal boolean false pipe 4.75
freeze_tell boolean false main 4.00 replaces freeze_tell_mailmaster
from string* unset autoreply
gecos_name string* unset main
gecos_pattern string unset main
gethostbyname boolean false smtp
gnutls_allow_auto_pkcs11 boolean false main 4.82
gnutls_compat_mode boolean unset main 4.70
gnutls_require_kx string* unset main 4.67 deprecated, warns
string* unset smtp 4.67 deprecated, warns
gnutls_require_mac string* unset main 4.67 deprecated, warns
string* unset smtp 4.67 deprecated, warns
gnutls_require_protocols string* unset main 4.67 deprecated, warns
string* unset smtp 4.67 deprecated, warns
group string + routers 4.00
unset transports 4.00 replaces local option in some transports
header_line_maxsize integer 0 (unset) main 4.14
header_maxsize integer 1M main 4.14
headers string* unset autoreply
headers_add string* unset routers 4.00
unset transports
headers_charset string ++ main 4.21
headers_only boolean false transports 2.05
headers_remove string* unset routers 4.00
unset transports
headers_rewrite string unset transports 3.20
helo_accept_junk_hosts host list unset main 3.00
helo_allow_chars string "" main 4.02
helo_lookup_domains domain list unset main 4.00
helo_data string* "$primary_hostname" smtp 3.21
helo_try_verify_hosts host list unset main 4.00
helo_verify_hosts host list unset main 1.73
hide_child_in_errmsg false redirect 4.00
hold_domains domain list unset main 1.70
home_directory string* unset transports 4.00 replaces individual options
host_all_ignored string "defer" manualroute 4.67
host_find_failed string "freeze" manualroute 4.00
host_name_extract string
"${if and {{match{.outlook.com\\$}{$host}} {match{$item}{\\N^250-([\\w.]+)\\s\\N}}} {$1}}"
smtp 4.96
host_lookup host list unset main 3.00
host_lookup_order string list "bydns:byaddr" main 4.30
host_reject_connection host list unset main 4.00
hosts string unset iplookup 4.00
string list* unset smtp
hosts_avoid_esmtp host list unset smtp 4.21
hosts_avoid_pipelining host list unset smtp 4.67
hosts_avoid_tls host list unset smtp 3.20
hosts_connection_nolog host list unset main 4.43
hosts_max_try integer 5 smtp 3.20
hosts_max_try_hardlimit integer 50 smtp 4.50
hosts_nopass_tls host list unset smtp 4.00
hosts_noproxy_tls host list "*" smtp 4.90
hosts_override boolean false smtp 2.11
hosts_pipe_connect host_list unset smtp 4.93 if experimental_pipe_connect
hosts_randomize boolean false manualroute 4.00
false smtp 3.14
hosts_require_auth host list unset smtp 4.00
hosts_require_alpn host list unset main 4.95
smtp 4.95
hosts_require_dane host list unset smtp 4.91 (4.85 experimental)
hosts_require_helo host list "*" main 4.95
hosts_require_ocsp host list unset smtp 4.82 if experimental_ocsp
hosts_require_tls host list unset smtp 3.20
hosts_treat_as_local domain list unset main 1.95
hosts_try_auth host list unset smtp 4.00
hosts_try_dane host list unset smtp 4.91 (4.85 experimental)
hosts_try_fastopen host list unset smtp 4.88
hosts_try_prdr host list unset smtp 4.82 if experimental_prdr
ibase_servers string unset main 4.23
ignore_bounce_errors_after time 0s main 4.00
ignore_eacces boolean false redirect 4.00
ignore_enotdir boolean false redirect 4.00
ignore_fromline_hosts host list unset main
ignore_fromline_local boolean false main 2.05
ignore_status boolean false pipe
ignore_target_hosts host list unset routers 4.00
include_directory string unset redirect 4.00
initgroups false routers 4.00
interface string list unset smtp 1.70
keep_malformed time 4d main
keepalive boolean true smtp 2.05
ldap_default_servers string list unset main 3.02
ldap_version int 2 or 3 main 4.14
limits_advertise_hosts host list * main 4.98
local_from_check boolean true main 3.14
local_from_prefix string unset main 3.14
local_from_suffix string unset main 3.14
local_interfaces string list unset main 1.60
local_part_prefix string unset routers 4.00 replaces prefix
local_part_prefix_optional boolean unset routers 4.00 replaces prefix_optional
local_part_suffix string unset routers 4.00 replaces suffix
local_part_suffix_optional boolean unset routers 4.00 replaces suffix_optional
local_parts string list* unset routers 4.00
local_scan_timeout time 5m main 4.03
local_sender_retain boolean false main 4.00
localhost_number string unset main
lock_fcntl_timeout time 0s appendfile 3.14
lock_flock_timeout time 0s appendfile 4.11
lock_interval time 3s appendfile
lock_retries integer 10 appendfile
lockfile_mode octal-integer 0600 appendfile
lockfile_timeout time 30m appendfile
log string* unset autoreply
log_as_local boolean + routers 4.00
log_file_path string list ++ main
log_defer_output boolean false pipe 1.89
log_fail_output boolean false pipe 1.60
log_output boolean false pipe 1.60
log_selector string unset main 4.00
log_timezone boolean false main 4.11
lookup_open_max integer 25 main 2.05
mailbox_filecount string* unset appendfile 4.43
mailbox_size string* unset appendfile 4.43
maildir_format boolean false appendfile 1.70
maildir_retries integer 10 appendfile 1.70
maildir_tag string* unset appendfile 1.92
maildir_use_size_file boolean* false appendfile 4.30 expanded in 4.77
maildirfolder_create_regex string unset appendfile 4.62
mailstore_format boolean false appendfile 2.00
mailstore_prefix string* unset appendfile 2.00
mailstore_suffix string* unset appendfile 2.00
match_directory string* unset localuser
max_output integer 20K pipe
max_rcpt integer 100 smtp 1.60
max_user_name_length integer 0 main
mbx_format boolean false appendfile 2.10
message_body_newlines boolean false main 4.68
message_body_visible integer 500 main
message_id_header_domain string* unset main 4.11
message_id_header_text string* unset main
message_linelength_limit integer 998 smtp 4.94
message_logs boolean true main 4.10
message_prefix string* + appendfile 4.00 replaces prefix
string* unset pipe 4.00 replaces prefix
message_size_limit integer 50M main
0 transports 2.05
message_suffix string* + appendfile 4.00 replaces suffix
string* unset pipe 4.00 replaces suffix
mode octal-integer 0600 appendfile
0600 autoreply
mode_fail_narrower boolean true appendfile 1.70
modemask octal-integer 022 redirect 4.00
more boolean true routers 4.00
move_frozen_messages boolean false main 3.09
multi_domain boolean true smtp
mx_domains domain list unset dnslookup 4.00
mx_fail_domains domain list unset dnslookup 4.43
mysql_servers string list unset main 3.03
never_users string list unset main
notifier_socket string "$spool_directory/exim_daemon_notify"
main 4.94
notify_comsat boolean false appendfile
once string* unset autoreply
once_file_size integer 0 autoreply 3.20
once_repeat time 0s autoreply 2.95
one_time boolean false redirect 4.00
openssl_options string +no_sslv2 main 4.73 default changed in 4.80
optional boolean false iplookup 4.00
oracle_servers string unset main 4.00
owners string list unset redirect 4.00
owngroups string list unset redirect 4.00
panic_coredump boolean false main 4.96
pass_on_timeout boolean false routers 4.00
pass_router string unset routers 4.00
path string "/usr/bin" pipe
percent_hack_domains domain list unset main
perl_at_start boolean false main 2.10
perl_startup string unset main 2.10
permit_coredump boolean false pipe 4.73
pgsql_servers string list unset main 3.14
pid_file_path string ++ main
pipe_as_creator boolean false pipe
pipe_transport string* unset redirect 4.00
pipelining_advertise_hosts host list "*" main 4.14
pipelining__connect_advertise_hosts host list "*" main 4.92 if experimental_pipe_connect
port integer 0 iplookup 4.00
string "smtp" smtp
preserve_message_logs boolean false main
prdr_enable boolean false main 4.82 if experimental_prdr
primary_hostname string + main
print_topbitchars boolean false main 1.89
process_log_path string unset main 4.21
prod_requires_admin boolean true main 1.70
protocol string "udp" iplookup 4.00
string "smtp" smtp 3.20
public_name string unset authenticators 3.10
qualify_domain string + main
string* unset redirect 4.31
qualify_preserve_domain boolean false redirect 4.00
qualify_recipient string + main
qualify_single boolean true dnslookup 4.00
query string* + iplookup 4.00
queue_domains domain list unset main 4.00
queue_fast_ramp boolean false main 4.95
queue_list_requires_admin boolean true main 1.95
queue_only boolean false main
queue_only_file string unset main 2.05
queue_only_load fixed-point unset main
queue_only_load_latch boolean true main 4.68
queue_only_override boolean true main 4.21
queue_run_in_order boolean false main 1.70
queue_run_max integer 5 main
queue_smtp_domains domain list unset main
quota string* unset appendfile 1.60
quota_directory string* unset appendfile 4.11
quota_filecount integer 0 appendfile 2.05
quota_is_inclusive boolean true appendfile 3.20
quota_size_regex string unset appendfile 3.14
quota_warn_message string* + appendfile 2.10
quota_warn_threshold string* 0 appendfile 2.10
rcpt_include_affixes boolean false transports 4.21
receive_timeout time 0s main 4.00 replacing accept_timeout
received_header_text string* + main
received_headers_max integer 30 main
recipient_unqualified_hosts host list unset main 4.00 replacing receiver_unqualified_hosts
recipients_max integer* 50000 main 1.60 default changed in 4.95 (was 0)
recipients_max_reject boolean false main 1.70
redirect_router string unset routers 4.00
remote_max_parallel integer 1 main
remote_sort_domains domain list unset main 4.00 replacing remote_sort
repeat_use boolean true redirect 4.00
reply_to string* unset autoreply 2.05
reply_transport string* unset redirect 4.00
require_files string list* unset routers 4.00
reroute string* unset iplookup 4.00
response_pattern string unset iplookup 4.00
restrict_to_path boolean false pipe
retry_data_expire time 7d main 3.03
retry_include_ip_address boolean true smtp 1.92
retry_interval_max time 24h main
retry_use_local_part boolean + routers 4.00
+ transports 4.00 replacing individual options
return_fail_output boolean false pipe 1.60
return_message boolean false autoreply
return_output boolean false pipe
return_path string* unset transports 2.05
return_path_add boolean false transports
return_path_remove boolean true main
return_size_limit integer 100K main renamed bounce_return_size_limit in 4.23
rewrite boolean true redirect 4.00
rewrite_headers boolean true dnslookup 4.00
rfc1413_hosts host list * main
rfc1413_query_timeout time 5s main
router_home_directory string* unset routers 4.11
route_data string* unset manualroute 4.00
route_list string list unset manualroute 4.00
same_domain_copy_routing boolean false dnslookup 4.00
search_parents boolean false dnslookup 4.00
self string "freeze" routers 4.00
sender_unqualified_hosts host list unset main
senders address list unset routers 4.00
serialize_hosts host list unset smtp 1.60
server_advertise_condition string* unset authenticators 4.14
server_channelbinding bool false gsasl 4.80
server_condition string* unset authenticators 3.10 (plaintext) 4.64 (others)
server_hostname string* "$primary_hostname" cyrus_sasl,gsasl,heimdal_gssapi (cyrus-only) 4.80 (others)
server_keytab string* unset heimdal_gssapi 4.80
server_mail_auth_condition string* unset authenticators 3.22
server_mech string public_name cyrus_sasl,gsasl 4.43 (cyrus-only) 4.80 (others)
server_password string unset gsasl 4.80
server_param1 string* unset tls (auth) 4.86
server_param2 string* unset tls (auth) 4.86
server_param3 string* unset tls (auth) 4.86
server_param2 string* unset tls (auth) 4.86 (tls-only) 4.93 (external)
server_param3 string* unset tls (auth) 4.86 (tls-only) 4.93 (external)
server_prompts string* unset plaintext 3.10
server_realm string unset cyrus_sasl,gsasl 4.43 (cyrus-only) 4.80 (others)
server_scram_iter string* unset gsasl 4.80
server_scram_salt string* unset gsasl 4.80
server_secret string* unset cram_md5 3.10
server_service string "smtp" cyrus_sasl,gsasl,heimdal_gssapi (cyrus-only) 4.80 (others)
server_set_id string* unset authenticators 3.10
set string* unset routers 4.93
shadow_condition string* unset transports
shadow_transport string unset transports
sieve_inbox string* "inbox" redirect 4.99
sieve_enotify_mailto_owner string* "inbox" redirect
sieve_subaddress string* "inbox" redirect
sieve_useraddress string* "inbox" redirect
sieve_vacation_directory string* "inbox" redirect
size_addition integer 1024 smtp 1.91
skip_syntax_errors boolean false redirect 4.00
smtp_accept_keepalive boolean true main
smtp_accept_max integer 20 main
smtp_accept_max_nonmail integer 10 main 4.11
smtp_accept_max_nonmail_hosts host list * main 4.14
smtp_accept_max_per_connection integer 1000 main 4.00
smtp_accept_max_per_host integer 0 main 2.05
smtp_accept_queue integer 0 main
smtp_accept_queue_per_connection integer 10 main 2.03
smtp_accept_reserve integer 0 main
smtp_active_hostname string* unset main 4.33
smtp_backlog_monitor integer 0 main 4.95
smtp_banner string* + main
smtp_check_spool_space boolean true main 2.10
smtp_connect_backlog integer 5 main
smtp_enforce_sync boolean true main 4.00
smtp_etrn_command string* unset main 1.92
smtp_etrn_serialize boolean true main 1.89
smtp_load_reserve fixed-point unset main
smtp_max_synprot_errors integer 3 main 4.30
smtp_max_unknown_commands integer 3 main 4.14
smtp_ratelimit_hosts host list unset main 4.00
smtp_ratelimit_mail string unset main 4.00
smtp_ratelimit_rcpt string unset main 4.00
smtp_receive_timeout time 5m main
smtp_reserve_hosts host list unset main
smtp_return_error_details boolean false main 4.11
socket string* unset lmtp 4.11
spamd_address string* + main 4.50 with content scan
spf_guess string "v=spf1 a/24 mx/24 ptr ?all"
main 4.91 with SUPPORT_SPF
spf_smtp_comment_template string* "Please see http://www.open-spf.org/Why"
main 4.94 with SUPPORT_SPF
split_spool_directory boolean false main 1.70
spool_directory string ++ main
spool_wireformat boolean false main 4.90
sqlite_dbfile string* unset main 4.94 with LOOKUP_SQLITE
sqlite_lock_timeout time 5s main 4.53
strict_acl_vars boolean false main 4.64
srv_fail_domains domain list unset dnslookup 4.43
strip_excess_angle_brackets boolean false main
strip_trailing_dot boolean false main
subject string* unset autoreply
syntax_errors_text string* unset redirect 4.00
syntax_errors_to string unset redirect 4.00
syslog_duplication boolean true main 4.21
syslog_facility string unset main 4.20
syslog_processname string "exim" main 4.20
syslog_timestamp boolean true main 4.00
system_filter string unset main 4.00 replacing message_filter
system_filter_directory_transport string unset main 4.00 replacing message_filter
system_filter_file_transport string unset main 4.00 replacing message_filter
system_filter_group string unset main 4.00 replacing message_filter
system_filter_pipe_transport string unset main 4.00 replacing message_filter
system_filter_reply_transport string unset main 4.00 replacing message_filter
system_filter_user string unset main 4.00 replacing message_filter
tcp_nodelay boolean true main 4.23
true smtp 4.23
tcp_wrappers_daemon_name string* ++ main 4.73
temp_errors string list + pipe 1.95
text string* unset autoreply
timeout time 5m lmtp 3.20
1h pipe
1h queryprogram 4.00
5s iplookup 4.00
timeout_defer boolean false pipe 4.51
timeout_frozen_after time 0s main 3.20
timezone string + main 3.15
tls_advertise_hosts host list * main 3.20
tls_alpn string* unset main 4.95
smtp 4.95
tls_certificate string* unset main 3.20
unset smtp 3.20
tls_dh_max_bits integer 2236 main 4.80
tls_dh_min_bits integer 1024 smtp 4.82
tls_dhparam string* unset main 3.20
tls_ocsp_file string* unset main 4.80 if experimental_ocsp
tls_on_connect_ports string unset main 4.43
tls_privatekey string* unset main 3.20
unset smtp 3.20
tls_remember_emstp boolean false main 4.21
tls_require_ciphers string* unset smtp 4.00 replaces tls_verify_ciphers
string* unset main 4.33
tls_resumption_hosts host list* unset main 4.95
host list* unset smtp 4.95
tls_sni string* unset main 4.80
tls_tempfail_tryclear boolean true smtp 4.05
tls_try_verify_hosts host list unset main 4.00
tls_verify_certificates string* unset main 3.20
unset smtp 3.20
tls_verify_hosts host list unset main 3.20
to string* unset autoreply
translate_ip_address string unset routers 4.00
transport string* unset routers 4.00
transport_current_directory string unset routers 4.00
transport_home_directory string unset routers 4.00
transport_filter string unset transports
transport_filter_timeout time 5m transports 4.30
trusted_groups string list unset main
trusted_users string list unset main
umask octal-integer 022 pipe
unknown_login string unset main
unknown_username string unset main
unseen boolean false routers 4.00
untrusted_set_sender boolean false main 3.20
use_bsmtp boolean false appendfile 4.00
false pipe 4.00
use_crlf boolean false appendfile 1.89
false pipe 1.89
use_fcntl_lock boolean + appendfile 1.70
use_flock_lock boolean + appendfile 4.11
use_lockfile boolean + appendfile
use_mbx_lock boolean + appendfile 2.10
use_shell boolean false pipe 1.70
user string + routers 4.00
unset transports 4.00 replaces individual options
utf8_downconvert integer unset smtp 4.92 if SUPPORT_I18N
uucp_from_pattern string + main 1.75
uucp_from_sender string* "$1" main 1.75
verify boolean true routers 4.00
verify_only boolean false routers 4.00
verify_recipient boolean true routers 4.00
verify_sender boolean true routers 4.00
warn_message_file string* unset main 4.00 expanded from 4.94
widen_domains string list unset dnslookup 4.00
write_rejectlog boolean true main 4.31
2. COMMAND LINE OPTIONS
-----------------------
The table below contains a complete list of all Exim's command line options.
Those marked with # are available only to trusted users, those marked with +
are available only to admin users, and those marked with * exist only to
provide compatibility with Sendmail.
-- Terminate options
--help Give a little help (not a lot)
--version Give version information (alias for -bV)
-B * Ignored
-bd + Start daemon
-bdf + Start daemon and run it in the foreground
-be Test string expansion
-bem Test string expansion, read test message first
-bF Test system filter file
-bf Test user filter file
-bfd Set domain for filter testing
-bfl Set local part for filter testing
-bfp Set local part prefix for filter testing
-bfs Set local part suffix for filter testing
-bh Test incoming SMTP call, omitting callouts
-bhc Test incoming SMTP call, with callouts
-bi * Run bi_command
-bI:help Show list of accepted -bI: options
-bm Accept message on standard input
-bmalware + Invoke configured malware scanning against supplied filename
-bnq Don't qualify addresses in locally submitted messages
-bP Show configuration option settings
-bp + List the queue
-bpa + ... with generated addresses as well
-bpc + ... but just show a count of messages
-bpr + ... do not sort
-bpra + ... with generated addresses, unsorted
-bpru + ... only undelivered addresses, unsorted
-bpu + ... only undelivered addresses
-brt Test retry rules
-brw Test rewriting rules
-bS Read batch SMTP on standard input
-bs Run SMTP on standard input and output
-bt Test address directing and routing
-bV Verify version number
-bv Test recipient address verification
-bvs Test sender address verification
-bw + Inetd wait mode
-C + Use alternate configuration file
-D + Define macro for configuration file
-d + Turn on debugging output
-dd + Ditto, but if a daemon, not for subprocesses
-dropcr Remove CR character in input: became a no-op in 4.21
-E Internal use only
-ex * Synonym for -oex (for several different x)
-F Set calling user name
-f # Set calling user address
-G * Ignored
-h * Ignored
-i Dot does not terminate message
-M + Force deliver specific message
-Mar + Add recipient to message
-MC Internal use only
-MCA Internal use only
-MCP Internal use only
-MCQ Internal use only
-MCS Internal use only
-MCT Internal use only
-Mc + Deliver specific message
-Mes + Edit message sender
-Mf + Freeze message(s)
-Mg + Give up (bounce) message(s)
-Mmad + Mark all recipients delivered
-Mmd + Mark one recipient delivered
-Mrm + Remove message(s) (no bounce)
-Mset + Load message's variables when testing with -be
-Mt + Thaw message(s)
-Mvb + View message body
-Mvc + View entire message in RFC 2822 format
-Mvh + View message header
-Mvl + View message log
-m * Ignored
-N + Deliver without transporting
-n * Ignored
-O * Ignored
-oA * Supply argument for
-oB Set max messages down one connection
-odb Background delivery
-odf Foreground delivery
-odi Foreground delivery
-odq Queue message; do not deliver
-odqs ... do not do SMTP deliveries
-oee Error sent by mail; zero return code
-oem Error sent by mail; non-zero return code
-oep Error written to standard error stream
-oeq * Error written to standard error stream
-oew * Error sent by mail; non-zero return code
-oi Dot does not terminate message
-oitrue * Dot does not terminate message
-oMa # Supply host address
-oMaa # Supply authenticator name
-oMai # Supply authenticated id
-oMas # Supply authenticated sender
-oMi # Supply interface address
-oMm # Supply message reference
-oMr # Supply protocol name
-oMs # Supply host name
-oMt # Supply ident string
-om * Ignored
-oo * Ignored
-oP * Specify path for daemon's pid file
-or Timeout non-SMTP messages
-os Timeout for SMTP messages
-ov * Verbose; same as -v
-oX Alternative port for daemon
-pd Delay Perl interpreter start
-ps Do not delay Perl interpreter start
-p: * Same as -oMr -oMs
-q + Run the queue )
-qf + ... force delivery ) Other combinations are
-qff + ... and include frozen messages ) possible. The syntax is
-qi + ... initial deliveries only )
-ql + ... local deliveries only ) -q[q][f][f][i|l][time]
-qq + Two-stage queue run )
-qR * Same as -R
-qS * Same as -S
-R Select by recipient in queue run
-Rf ... with forcing
-Rff ... and frozen messages
-Rr ... using regular expression
-Rrf ... with forcing
-Rrff ... and frozen messages
-r * Synonym for -f
-S Select by sender in queue run
-Sf ... with forcing
-Sff ... and frozen messages
-Sr ... using regular expression
-Srf ... with forcing
-Srff ... and frozen messages
-Tqt * Used by Exim test suite; not recognized in normal use
-t Take recipients from header lines
-ti * Same as -t -i
-tls-on-connect Do TLS on startup (for legacy clients)
-U * Ignored
-v Verbose - shows SMTP dialogue and other delivery info
-x Ignored (AIX compatibility)
3. BUILD TIME OPTIONS FOR EXIM
------------------------------
The table below contains a "mostly" complete list of options that can be
set in Local/Makefile when building Exim. The only items not included are
those whose names can be trivially derived from rules stated below.
More information about individual options can be found in src/EDITME and
OS/Makefile-Default.
The second column below gives the type of option:
. `system' means the option is concerned with the operating system;
. `driver' means the option selects a driver to be included in the binary;
. `lookup' means the option selects a lookuptype to be included in the binary;
. `mandatory' means the option is required to be supplied;
. `recommended' means the option is recommended to be supplied;
. `optional' means what it says;
Those marked with * are specialized and are unlikely to be required in most
installations. Those that are marked with ** are commonly set in OS-specific
Makefiles. If you use any of these in your Local/Makefile, you may need to
reproduce some of the OS-specific settings. For example, in the Makefile for
Solaris (which is actually called OS/Makefile-SunOS5), there is
LIBS=-lsocket -lnsl -lkstat
If you use LIBS to add extra libraries, you must also include the OS ones in
your setting. It is better, in this particular case, to use EXTRALIBS, which is
empty by default, and is provided for just this reason. Of course, if you do
actually want to modify a setting from the OS-specific file, there is nothing
to stop you overriding it in your Local/Makefile.
When building Exim with dynamically loaded lookup support, for "LOOKUP_FOO",
you can define "LOOKUP_FOO_INCLUDE" and "LOOKUP_FOO_LIBS", for includes and
libraries specific only to that module. These rules are only used where the
relevant lookup is a module. These options are not explicitly listed below.
Variables with names endined `_PC' are used for pkg-config integration; setting
the value to the name of a pkg-config package will cause Exim's build system to
query the --cflags and --libs for the given name, when building anything
dependent upon the component associated with the `_PC' variable. For lookups,
if the lookup is dynamically loaded, then this *replaces* the use of the
corresponding _INCLUDE and _LIBS options, which will be ignored. If the lookup
is statically loaded into Exim, the results will be inserted into the
"LOOKUP_INCLUDE" and "LOOKUP_LIBS" options. For authenticator, the results
will be inserted into the "CFLAGS" and "AUTH_LIBS" options. These options are
only listed below for the TLS implementation cases.
Option Type Description
------------------------------------------------------------------------------
ALT_CONFIG_PREFIX optional restricts location of -C files
APPENDFILE_MODE optional*
APPENDFILE_DIRECTORY_MODE optional*
APPENDFILE_LOCKFILE_MODE optional*
AR system command to build a library
AUTH_CRAM_MD5 driver include cram_md5 authenticator
AUTH_CYRUS_SASL driver include Cyrus SASL authenticator
AUTH_GSASL driver include GNU SASL authenticator
AUTH_HEIMDAL_GSSAPI driver include Heimdal GSSAPI authenticator
AUTH_LIBS system library linkage for authenticators
AUTH_PLAINTEXT driver include plaintext authenticator
AUTH_SPA driver include SPA (NTLM) authenticator
AUTH_VARS=3 optional* number of $auth variables
BASENAME_COMMAND system** path to basename
BASE_62=62 optional* not normally changed for Unix
BIN_DIRECTORY mandatory Exim binary directory
CC system** C compiler
CFLAGS system** flags for C compiler
CFLAGS_DYNAMIC system** extra flags needed for .so modules
CHGRP_COMMAND system** path to chgrp
CHOWN_COMMAND system** path to chown
COMPRESS_COMMAND system path to a compress command
COMPRESS_SUFFIX system suffix added to compressed files
CONFIGURE_FILE mandatory Exim runtime configuration file
CONFIGURE_FILE_USE_EUID optional*
CONFIGURE_FILE_USE_NODE optional*
CONFIGURE_GROUP optional* alternate group for configuration file
CONFIGURE_OWNER optional* alternate owner for configuration file
CYRUS_PWCHECK_SOCKET optional socket for pwcheck daemon
DBMLIB optional** location of DBM library
DB_DIRECTORY_MODE optional* mode for hints directory
DB_LOCKFILE_MODE optional* mode for hints lock files
DB_LOCK_TIMEOUT optional* timeout for hints lock files
DB_MODE optional* mode for hints files
DEFAULT_CRYPT optional default crypt() function
DELIVER_IN_BUFFER_SIZE optional*
DELIVER_OUT_BUFFER_SIZE optional*
DISABLE_DKIM optional disables DKIM support
DISABLE_DNSSEC optional disables attempts to use DNSSEC
DISABLE_D_OPTION optional disables -D option
ERRNO_QUOTA optional* error code for system quota failures
EXICYCLOG_MAX optional number of old log files to keep
EXIMDB_DIRECTORY_MODE optional* for hints database directory
EXIMDB_LOCKFILE_MODE optional* for hints lock files
EXIMDB_MODE optional* mode for hints files
EXIMON_TEXTPOP system**
EXIM_CHMOD optional*
EXIM_GROUP mandatory group to use for Exim
EXIM_MONITOR optional set to eximon.bin to compile
EXIM_PERL optional
EXIM_USER mandatory user to use for Exim
EXIWHAT_EGREP_ARG system** to find Exim processes from ps
EXIWHAT_KILL_SIGNAL system** -SIGUSR1 or numerical equivalent
EXIWHAT_MULTIKILL_CMD system**
EXIWHAT_MULTIKILL_ARG system**
EXIWHAT_PS_ARG system** to list all processes
EXIWHAT_PS_CMD system** path to ps command
EXPAND_LISTMATCH_RHS optional* restore pre-4.77 match_*{}{} behaviour
EXTRALIBS system additional libraries
EXTRALIBS_EXIM system additional libraries for Exim only
EXTRALIBS_EXIMON system additional libraries for the monitor
FIXED_NEVER_USERS optional can't override at runtime
HAVE_ICONV system the iconv() function is available
HAVE_IPV6 system include IPv6 support
HEADERS_CHARSET optional charset for decoded header lines
HEADER_ADD_BUFFER_SIZE optional* buffer for header_add()
HEADER_MAXSIZE optional* max memory for message header
HOSTNAME_COMMAND system** path to hostname command
INCLUDE system path to include files
INFO_DIRECTORY optional directory for Info documentation
INPUT_DIRECTORY_MODE optional mode for input directory
IPV6_INCLUDE system additional includes for IPv6
IPV6_LIBS system additional libraries for IPv6
LDAP_LIB_TYPE optional type of LDAP library
LFLAGS system** link editor flags
LIBIDENTCFLAGS system C flags when compiling libident
LIBIDENTNAME system name for libident library
LIBRESOLV system** library for DNS resolver
LIBS system** additional libraries
LIBS_EXIM system** additional libraries for Exim ony
LIBS_EXIMON system** additional libraries for monitor
LOCAL_SCAN_SOURCE optional location of local_scan() source
LOG_DIRECTORY_MODE optional mode for log directory
LOG_FILE_PATH optional path to log files
LOG_MODE optional mode for log files
LOOKUP_CDB lookup include cdb lookup
LOOKUP_DBM lookup include dbm lookup
LOOKUP_DNSDB lookup include dnsdb lookup
LOOKUP_DSEARCH lookup include dsearch lookup
LOOKUP_INCLUDE lookup include files for lookups
LOOKUP_LDAP lookup include ldap lookup
LOOKUP_LIBS lookup include libraries for lookups
LOOKUP_LSEARCH lookup include all lsearch lookups
LOOKUP_MODULE_DIR optional* where dynamic lookup modules live
LOOKUP_MYSQL lookup include mysql lookup
LOOKUP_NIS lookup include nis lookup
LOOKUP_NISPLUS lookup include nisplus lookup
LOOKUP_ORACLE lookup include oracle lookup
LOOKUP_PGSQL lookup include pgsql lookup
LOOKUP_TESTDB lookup*
LOOKUP_WHOSON lookup include whoson lookup
LOOKUP_*_INCLUDE optional* include files for dynamic module
LOOKUP_*_LIBS optional* libraries for dynamic module
MAKE_SHELL optional* shell to use for make
MAX_FILTER_SIZE optional* max file size for filter files
MAX_INCLUDE_SIZE optional* max file size for :include: files
MAX_LOCALHOST_NUMBER=256 optional* for when localhost_number is set
MAX_NAMED_LIST optional* max named lists of a given type
MAX_INTERFACES system maximum network interfaces
MSGLOG_DIRECTORY_MODE optional* mode for message log directory
MV_COMMAND system path to mv command
NO_SYMLINK optional install doesn't make 'exim" symlink
PCRE_CONFIG system* use pcre-config for PCRE support
PCRE_LIBS system* library for using PCRE
PERL_CC system* compiler for Perl interface code
PERL_CCOPTS system* flags for same
PERL_COMMAND system path to Perl
PERL_LIBS system* library for compiling Perl interface
PID_FILE_PATH optional path to daemon's pid file
RADIUS_CONFIG_FILE optional path to Radius config file
RADIUS_LIB_TYPE optional type of RADIUS library
RANLIB system** path to ranlib command
RM_COMMAND system path to rm command
ROUTER_ACCEPT driver include accept router
ROUTER_DNSLOOKUP driver include dnslookup router
ROUTER_MANUALROUTE driver include manualroute router
ROUTER_IPLITERAL driver include ipliteral router
ROUTER_IPLOOKUP driver include iplookup router
ROUTER_REDIRECT driver include redirect router
ROUTER_QUERYPROGRAM driver include queryprogram router
SPOOL_DIRECTORY recommended path to spool directory
SPOOL_DIRECTORY_MODE optional mode of spool directory
SPOOL_MODE optional mode of spool files
STRING_SPRINTF_BUFFER_SIZE optional* buffer for string_sprintf()
STRIP_COMMAND optional* can be used to strp binaries
SUPPORT_A6 optional* support A6 DNS records
SUPPORT_CRYPTEQ optional support crypteq (if no auths)
SUPPORT_MAILDIR optional support for maildir delivery
SUPPORT_MAILSTORE optional support for mailstore delivery
SUPPORT_MBX optional support for MBX delivery
SUPPORT_MOVE_FROZEN_MESSAGES optional* support for frozen message moving
SUPPORT_PAM optional support for PAM authentication
SUPPORT_TLS optional support for TLS encryption over SMTP
SUPPORT_TRANSLATE_IP_ADDRESS optional* support for address translation
SYSLOG_LOG_PID optional add pid to syslog lines
SYSLOG_LONG_LINES optional do not split long syslog lines
SYSTEM_ALIASES_FILE optional defaults to /etc/aliases
TCP_WRAPPERS_DAEMON_NAME system* daemon name used by tcpwrappers library
TIMEZONE_DEFAULT optional default for timezone option
TLS_INCLUDE optional path to include files for TLS
TLS_LIBS optional additional libraries for TLS
EXIM_TMPDIR system value for TMPDIR environment variable
TRANSPORT_APPENDFILE driver include appendfile transport
TRANSPORT_AUTOREPLY driver include autoreply transport
TRANSPORT_LMTP driver include lmtp transport
TRANSPORT_PIPE driver include pipe transport
TRANSPORT_SMTP driver include smtp transport
TRUSTED_CONFIG_LIST optional config files safe to retain privileges
USE_DB system** use native DB interface
USE_GNUTLS optional use GnuTLS instead of OpenSSL
USE_GNUTLS_PC optional probably "gnutls"
USE_OPENSSL_PC optional probably "openssl"
USE_READLINE optional try to load libreadline for -be
USE_TCP_WRAPPERS system link with tcpwrappers
USE_TDB optional use the tdb DB interface
WHITELIST_D_MACROS optional -Dmacros safe to retain privileges with
WITH_OLD_CLAMAV_STREAM optional* use ClamAV API from before ClamAV 0.95
X11 system** X11 base directory
X11_LD_LIB system** X11 link library
XINCLUDE system** X11 include directory
XLFLAGS system** X11 link time flags
ZCAT_COMMAND system path to zcat command
4. BUILD TIME OPTIONS FOR EXIMON
--------------------------------
The table below contains a complete list of options that can be set in
Local/eximon.conf when building the Exim monitor. Where the default is shown as
** it means that the text string is too long to fit in the table and is instead
given below. A blank default means that there is no default value.
ACTION_OUTPUT=no show output for every action
ACTION_QUEUE_UPDATE=yes update queue display after actions
BODY_MAX=20000 maximum body display
DOMAIN= domain to strip from window title
LOG_BUFFER=20K buffer for log tail
LOG_DEPTH=300 depth of log subwindow
LOG_FONT=** font for log display
LOG_STRIPCHARTS=** patterns for stripcharts
LOG_WIDTH=950 width of log subwindow
MENU_EVENT='Shift' keypress for menu
MIN_HEIGHT=162 minimum window height
MIN_WIDTH=103 minimum window width
QUALIFY_DOMAIN= local domain to strip from addresses
QUEUE_DEPTH=200 depth of queue subwindow
QUEUE_FONT=$LOG_FONT font for queue display
QUEUE_INTERVAL=300 queue refresh interval
QUEUE_MAX_ADDRESSES=10 max addresses to show in queue
QUEUE_STRIPCHART_NAME=queue name for queue stripchart
QUEUE_WIDTH=950 width of queue subwindow
SIZE_STRIPCHART= request partition size stripchart
SIZE_STRIPCHART_NAME=space name for size stripchart
START_SMALL=no if yes, start with small window
STRIPCHART_INTERVAL=60 stripchart refresh interval
TEXT_DEPTH=200 depth of text windows
WINDOW_TITLE="${hostname} eximon" window title
The default for LOG_FONT is
LOG_FONT=-misc-fixed-medium-r-normal-*-14-140-*-*-*-*-iso8859-1
and the default for LOG_STRIPCHARTS is
LOG_STRIPCHARTS='/ <= /in/
/ => /out/
/ => .+ R=local/local/
/ => .+ T=[^ ]*smtp/smtp/'
That is, there are four stripcharts, named in, out, local, and smtp. The first
counts message arrivals, the second counts all deliveries, the third counts
deliveries where the router's name starts with "local", and the fourth counts
deliveries where the transport name contains "smtp".
**** End of OptionLists ****