1. Those that can appear in the run time configuration file;
2. Those that can be used on the command line;
1. Those that can appear in the run time configuration file;
2. Those that can be used on the command line;
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_auth string* unset main 4.00
acl_smtp_connect string* unset main 4.11
acl_smtp_data string* unset main 4.00
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_etrn string* unset main 4.00
acl_smtp_expn string* unset main 4.00
acl_smtp_helo string* unset main 4.20
allow_filter boolean false redirect 4.00
allow_freeze boolean false redirect 4.00
allow_fifo boolean false appendfile 3.13
allow_filter boolean false redirect 4.00
allow_freeze boolean false redirect 4.00
allow_fifo boolean false appendfile 3.13
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
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
auth_advertise_hosts host list "*" main 4.00
authenticated_sender string* unset smtp 4.14
authenticated_sender_force boolean false smtp 4.61
auth_advertise_hosts host list "*" main 4.00
authenticated_sender string* unset smtp 4.14
authenticated_sender_force boolean false smtp 4.61
bcc string* unset autoreply
bi_command string unset main
body_only boolean false transports 2.05
bcc string* unset autoreply
bi_command string unset main
body_only boolean false transports 2.05
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_message_text string unset main 4.00
bounce_return_body boolean true main 4.23
bounce_return_message boolean true main 4.00
client_condition string* unset authenticators 4.68
client_ignore_invalid_base64 boolean false plaintext 4.61
client_name string* + cram_md5 3.10
client_condition string* unset authenticators 4.68
client_ignore_invalid_base64 boolean false plaintext 4.61
client_name string* + cram_md5 3.10
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
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
condition string* unset routers 4.00
connect_timeout time 0s smtp 1.60
connection_max_messages integer 500 smtp 4.00 replaces batch_max
condition string* unset routers 4.00
connect_timeout time 0s smtp 1.60
connection_max_messages integer 500 smtp 4.00 replaces batch_max
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
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
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
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
delay_after_cutoff boolean true smtp
delay_warning time list 24h main
delay_warning_condition string* + main 1.73
delay_after_cutoff boolean true smtp
delay_warning time list 24h main
delay_warning_condition string* + main 1.73
dkim_selector string* unset smtp 4.70
dkim_sign_headers string* (RFC4871) smtp 4.70
dkim_strict 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
dkim_verify_signers string* $dkim_signers main 4.70
directory string* unset appendfile
directory_file string* + appendfile
+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_ipv4_lookup boolean false main 3.20
dns_qualify_single boolean true smtp
dns_retrans time 0s main 1.60
dns_ipv4_lookup boolean false main 3.20
dns_qualify_single boolean true smtp
dns_retrans time 0s main 1.60
dsn_from string* + main 4.67
envelope_to_add boolean false transports
envelope_to_remove boolean true main
dsn_from string* + main 4.67
envelope_to_add boolean false transports
envelope_to_remove boolean true main
expn boolean true routers
extra_local_interfaces string unset main 4.21
extract_addresses_remove_arguments boolean true main 1.92
expn boolean true routers
extra_local_interfaces string unset main 4.21
extract_addresses_remove_arguments boolean true main 1.92
forbid_pipe boolean false redirect 4.00
forbid_sieve_filter boolean false redirect 4.44
forbid_smtp_code boolean false redirect 4.63
forbid_pipe boolean false redirect 4.00
forbid_sieve_filter boolean false redirect 4.44
forbid_smtp_code boolean false redirect 4.63
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
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
gecos_name string* unset main
gecos_pattern string unset main
gethostbyname boolean false smtp
gecos_name string* unset main
gecos_pattern string unset main
gethostbyname boolean false smtp
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_compat_mode boolean unset main 4.70
gnutls_require_kx string* unset main 4.67 deprecated, warns
string* unset smtp 4.67 deprecated, warns
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_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_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_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
ibase_servers string unset main 4.23
ignore_bounce_errors_after time 0s main 4.00
ignore_eacces boolean false redirect 4.00
ibase_servers string unset main 4.23
ignore_bounce_errors_after time 0s main 4.00
ignore_eacces boolean false redirect 4.00
message_body_visible integer 500 main
message_id_header_domain string* unset main 4.11
message_id_header_text string* unset main
message_body_visible integer 500 main
message_id_header_domain string* unset main 4.11
message_id_header_text string* unset main
message_logs boolean true main 4.10
message_prefix string* + appendfile 4.00 replaces prefix
string* unset pipe 4.00 replaces prefix
message_logs boolean true main 4.10
message_prefix string* + appendfile 4.00 replaces prefix
string* unset pipe 4.00 replaces prefix
mx_fail_domains domain list unset dnslookup 4.43
mysql_servers string list unset main 3.03
never_users string list unset main
mx_fail_domains domain list unset dnslookup 4.43
mysql_servers string list unset main 3.03
never_users string list unset main
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
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
optional boolean false iplookup 4.00
oracle_servers string unset main 4.00
owners string list unset redirect 4.00
optional boolean false iplookup 4.00
oracle_servers string unset main 4.00
owners string list unset redirect 4.00
pipe_as_creator boolean false pipe
pipe_transport string* unset redirect 4.00
pipelining_advertise_hosts host list "*" main 4.14
pipe_as_creator boolean false pipe
pipe_transport string* unset redirect 4.00
pipelining_advertise_hosts host list "*" main 4.14
primary_hostname string + main
print_topbitchars boolean false main 1.89
process_log_path string unset main 4.21
primary_hostname string + main
print_topbitchars boolean false main 1.89
process_log_path string unset main 4.21
qualify_single boolean true dnslookup 4.00
query string* + iplookup 4.00
queue_domains domain list unset main 4.00
qualify_single boolean true dnslookup 4.00
query string* + iplookup 4.00
queue_domains domain list unset main 4.00
queue_list_requires_admin boolean true main 1.95
queue_only boolean false main
queue_only_file string unset main 2.05
queue_list_requires_admin boolean true main 1.95
queue_only boolean false main
queue_only_file string unset main 2.05
received_header_text string* + main
received_headers_max integer 30 main
recipient_unqualified_hosts host list unset main 4.00 replacing receiver_unqualified_hosts
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_reject boolean false main 1.70
redirect_router string unset routers 4.00
remote_max_parallel integer 1 main
recipients_max_reject boolean false main 1.70
redirect_router string unset routers 4.00
remote_max_parallel integer 1 main
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_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_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_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
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
shadow_condition string* unset transports
shadow_transport string unset transports
size_addition integer 1024 smtp 1.91
shadow_condition string* unset transports
shadow_transport string unset transports
size_addition integer 1024 smtp 1.91
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_accept_queue_per_connection integer 10 main 2.03
smtp_accept_reserve integer 0 main
smtp_active_hostname string* unset main 4.33
smtp_banner string* + main
smtp_check_spool_space boolean true main 2.10
smtp_connect_backlog integer 5 main
smtp_banner string* + main
smtp_check_spool_space boolean true main 2.10
smtp_connect_backlog integer 5 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
smtp_return_error_details boolean false main 4.11
socket string* unset lmtp 4.11
spamd_address string* + main 4.50 with content scan
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
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
timeout_frozen_after time 0s main 3.20
timezone string + main 3.15
tls_advertise_hosts host list * main 3.20
timeout_frozen_after time 0s main 3.20
timezone string + main 3.15
tls_advertise_hosts host list * main 3.20
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_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_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_sni string* unset main 4.80
tls_tempfail_tryclear boolean true smtp 4.05
tls_try_verify_hosts host list unset main 4.00
use_shell boolean false pipe 1.70
user string + routers 4.00
unset transports 4.00 replaces individual options
use_shell boolean false pipe 1.70
user string + routers 4.00
unset transports 4.00 replaces individual options
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
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
-bh Test incoming SMTP call, omitting callouts
-bhc Test incoming SMTP call, with callouts
-bi * Run <command>bi_command</command>
-bh Test incoming SMTP call, omitting callouts
-bhc Test incoming SMTP call, with callouts
-bi * Run <command>bi_command</command>
-bm Accept message on standard input
-bmalware + Invoke configured malware scanning against supplied filename
-bnq Don't qualify addresses in locally submitted messages
-bm Accept message on standard input
-bmalware + Invoke configured malware scanning against supplied filename
-bnq Don't qualify addresses in locally submitted messages
-oMai # Supply authenticated id
-oMas # Supply authenticated sender
-oMi # Supply interface address
-oMai # Supply authenticated id
-oMas # Supply authenticated sender
-oMi # Supply interface address
DELIVER_IN_BUFFER_SIZE optional*
DELIVER_OUT_BUFFER_SIZE optional*
DISABLE_DKIM optional disables DKIM support
DELIVER_IN_BUFFER_SIZE optional*
DELIVER_OUT_BUFFER_SIZE optional*
DISABLE_DKIM optional disables DKIM support
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
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
EXIWHAT_MULTIKILL_CMD system**
EXIWHAT_MULTIKILL_ARG system**
EXIWHAT_PS_ARG system** to list all processes
EXIWHAT_MULTIKILL_CMD system**
EXIWHAT_MULTIKILL_ARG system**
EXIWHAT_PS_ARG system** to list all processes
TIMEZONE_DEFAULT optional default for timezone option
TLS_INCLUDE optional path to include files for TLS
TLS_LIBS optional additional libraries for TLS
TIMEZONE_DEFAULT optional default for timezone option
TLS_INCLUDE optional path to include files for TLS
TLS_LIBS optional additional libraries for TLS
TRANSPORT_APPENDFILE driver include appendfile transport
TRANSPORT_AUTOREPLY driver include autoreply transport
TRANSPORT_LMTP driver include lmtp transport
TRANSPORT_APPENDFILE driver include appendfile transport
TRANSPORT_AUTOREPLY driver include autoreply transport
TRANSPORT_LMTP driver include lmtp transport