Fix the PIPE_CONNECT feature control in the template Makefile, the
[users/heiko/exim.git] / doc / doc-txt / OptionLists.txt
index 9c909f2f89d7dfccf9e55929e8cbb390e2d14de2..183f6b7220e3c0e12ab6e328709972bc26bb3408 100644 (file)
@@ -54,7 +54,7 @@ acl_not_smtp_mime                    string*         unset         main
 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_data_prdr                   string*         unset         main              4.82 with expreimental_prdr
+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_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
@@ -82,6 +82,7 @@ allow_localhost                      boolean         false         smtp
 allow_mx_to_ip                       boolean         false         main              3.14
 allow_symlink                        boolean         false         appendfile
 allow_utf8_domains                   boolean         false         main              4.14
 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
 auth_advertise_hosts                 host list       "*"           main              4.00
 authenticated_sender                 string*         unset         smtp              4.14
 authenticated_sender_force           boolean         false         smtp              4.61
@@ -97,7 +98,7 @@ batch_max                            integer         100           appendfile
 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_file                  string          unset         main              4.00
+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_message_text                  string          unset         main              4.00
 bounce_return_body                   boolean         true          main              4.23
 bounce_return_message                boolean         true          main              4.00
@@ -126,17 +127,22 @@ check_spool_space                    integer         0             main
 check_string                         string          "From "       appendfile        3.03
                                                      unset         pipe              3.03
 check_srv                            string*         unset         dnslookup         4.31
 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_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
 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
 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
 condition                            string*         unset         routers           4.00
 connect_timeout                      time            0s            smtp              1.60
 connection_max_messages              integer         500           smtp              4.00 replaces batch_max
@@ -147,11 +153,13 @@ current_directory                    string          unset         transports
 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
+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
 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
 delay_after_cutoff                   boolean         true          smtp
 delay_warning                        time list       24h           main
 delay_warning_condition              string*         +             main              1.73
@@ -165,6 +173,11 @@ dkim_private_key                     string*         unset         smtp
 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
@@ -173,19 +186,21 @@ directory_transport                  string*         unset         redirect
 disable_ipv6                         boolean         false         main              4.61
 disable_logging                      boolean         false         routers           4.11
                                                      false         transports        4.11
 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
-dmarc_history_file                   string          unset         main              4.82 if experimental_dmarc
-dmarc_tld_file                       string          unset         main              4.82 if experimental_dmarc
+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_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_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_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_dnssec                       integer         -1            main              4.82
 dns_use_edns0                        integer         -1            main              4.76
 domains                              domain list     unset         routers           4.00
 driver                               string          unset         authenticators
 dns_use_edns0                        integer         -1            main              4.76
 domains                              domain list     unset         routers           4.00
 driver                               string          unset         authenticators
@@ -205,6 +220,7 @@ escape_string                        string          ">From "      appendfile
 exim_group                           string          ++            main
 exim_path                            string          ++            main
 exim_user                            string          ++            main
 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
 expn                                 boolean         true          routers
 extra_local_interfaces               string          unset         main              4.21
 extract_addresses_remove_arguments   boolean         true          main              1.92
@@ -291,14 +307,19 @@ hosts_connection_nolog               host list       unset         main
 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_noproxy_tls                    host list       "*"           smtp              4.90
 hosts_override                       boolean         false         smtp              2.11
 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_randomize                      boolean         false         manualroute       4.00
                                                      false         smtp              3.14
 hosts_require_auth                   host list       unset         smtp              4.00
+hosts_require_dane                   host list       unset         smtp              4.91 (4.85 experimental)
 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_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
 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
@@ -361,6 +382,7 @@ message_body_newlines                boolean         false         main
 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_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_logs                         boolean         true          main              4.10
 message_prefix                       string*         +             appendfile        4.00 replaces prefix
                                      string*         unset         pipe              4.00 replaces prefix
@@ -379,6 +401,8 @@ mx_domains                           domain list     unset         dnslookup
 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
+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
 notify_comsat                        boolean         false         appendfile
 once                                 string*         unset         autoreply
 once_file_size                       integer         0             autoreply         3.20
@@ -401,6 +425,7 @@ 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
 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
 port                                 integer         0             iplookup          4.00
                                      string          "smtp"        smtp
 preserve_message_logs                boolean         false         main
@@ -419,6 +444,7 @@ qualify_recipient                    string          +             main
 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_fasst_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_list_requires_admin            boolean         true          main              1.95
 queue_only                           boolean         false         main
 queue_only_file                      string          unset         main              2.05
@@ -485,6 +511,11 @@ server_keytab                        string*         unset         heimdal_gssap
 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
@@ -492,6 +523,7 @@ server_scram_salt                    string*         unset         gsasl
 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
+set                                 string*         unset         routers           4.93
 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
@@ -523,8 +555,14 @@ 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
 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
 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
 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
@@ -557,6 +595,7 @@ timeout_defer                        boolean         false         pipe
 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_advertise_requiretls             host list       *             main              4.92 if experimental_requiretls
 tls_certificate                      string*         unset         main              3.20
                                                      unset         smtp              3.20
 tls_dh_max_bits                      integer         2236          main              4.80
 tls_certificate                      string*         unset         main              3.20
                                                      unset         smtp              3.20
 tls_dh_max_bits                      integer         2236          main              4.80
@@ -569,6 +608,8 @@ tls_privatekey                       string*         unset         main
 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_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_sni                              string*         unset         main              4.80
 tls_tempfail_tryclear                boolean         true          smtp              4.05
 tls_try_verify_hosts                 host list       unset         main              4.00
@@ -600,13 +641,14 @@ use_mbx_lock                         boolean         +             appendfile
 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
+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
 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
+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
 
 widen_domains                        string list     unset         dnslookup         4.00
 write_rejectlog                      boolean         true          main              4.31
 
@@ -714,6 +756,7 @@ provide compatibility with Sendmail.
 -oMai          # Supply authenticated id
 -oMas          # Supply authenticated sender
 -oMi           # Supply interface address
 -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
 -oMr           # Supply protocol name
 -oMs           # Supply host name
 -oMt           # Supply ident string
@@ -867,7 +910,7 @@ 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
 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**     -SIGUSER1 or numerical equivalent
+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_MULTIKILL_CMD        system**
 EXIWHAT_MULTIKILL_ARG        system**
 EXIWHAT_PS_ARG               system**     to list all processes
@@ -966,7 +1009,7 @@ TCP_WRAPPERS_DAEMON_NAME     system*      daemon name used by tcpwrappers librar
 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
-TMPDIR                       system       value for TMPDIR environment variable
+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_APPENDFILE         driver       include appendfile transport
 TRANSPORT_AUTOREPLY          driver       include autoreply transport
 TRANSPORT_LMTP               driver       include lmtp transport