1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
8 /* Almost all the global variables are defined together in this one header, so
9 that they are easy to find. However, those that are visible during the
10 compilation of the local_scan() function are defined separately in the
11 local_scan.h header file. */
13 /* First put any specials that are required for some operating systems. */
19 /* We need to be careful about width of int and atomicity in signal handlers,
20 especially with the rise of 64-bit systems breaking older assumptions. But
21 sig_atomic_t comes from signal.h so can't go into mytypes.h without including
22 signal support in local_scan, which seems precipitous. */
23 typedef volatile sig_atomic_t SIGNAL_BOOL;
25 /* Now things that are present only when configured. */
28 extern uschar *opt_perl_startup; /* Startup code for Perl interpreter */
29 extern BOOL opt_perl_at_start; /* Start Perl interpreter at start */
30 extern BOOL opt_perl_started; /* Set once interpreter started */
31 extern BOOL opt_perl_taintmode; /* Enable taint mode in Perl */
35 extern tree_node *dlobj_anchor; /* Tree of dynamically-loaded objects */
39 extern uschar *ibase_servers;
43 extern uschar *eldap_ca_cert_dir; /* Directory with CA certificates */
44 extern uschar *eldap_ca_cert_file; /* CA certificate file */
45 extern uschar *eldap_cert_file; /* Certificate file */
46 extern uschar *eldap_cert_key; /* Certificate key file */
47 extern uschar *eldap_cipher_suite; /* Allowed cipher suite */
48 extern uschar *eldap_default_servers; /* List of default servers */
49 extern uschar *eldap_require_cert; /* Peer certificate checking strategy */
50 extern BOOL eldap_start_tls; /* Use STARTTLS */
51 extern int eldap_version; /* LDAP version */
55 extern uschar *mysql_servers; /* List of servers and connect info */
59 extern uschar *oracle_servers; /* List of servers and connect info */
63 extern uschar *pgsql_servers; /* List of servers and connect info */
67 extern uschar *redis_servers; /* List of servers and connect info */
71 extern int sqlite_lock_timeout; /* Internal lock waiting timeout */
74 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
75 extern BOOL move_frozen_messages; /* Get them out of the normal directory */
78 /* These variables are outside the #ifdef because it keeps the code less
79 cluttered in several places (e.g. during logging) if we can always refer to
80 them. Also, the tls_ variables are now always visible. */
83 int active; /* fd/socket when in a TLS session */
84 int bits; /* bits used in TLS session */
85 BOOL certificate_verified; /* Client certificate verified */
87 BOOL dane_verified; /* ... via DANE */
88 int tlsa_usage; /* TLSA record(s) usage */
90 uschar *cipher; /* Cipher used */
91 BOOL on_connect; /* For older MTAs that don't STARTTLS */
92 uschar *on_connect_ports; /* Ports always tls-on-connect */
93 void *ourcert; /* Certificate we presented, binary */
94 void *peercert; /* Certificate of peer, binary */
95 uschar *peerdn; /* DN from peer */
96 uschar *sni; /* Server Name Indication */
98 OCSP_NOT_REQ=0, /* not requested */
99 OCSP_NOT_RESP, /* no response to request */
100 OCSP_VFY_NOT_TRIED, /* response not verified */
101 OCSP_FAILED, /* verify failed */
102 OCSP_VFIED /* verified */
103 } ocsp; /* Stapled OCSP status */
105 extern tls_support tls_in;
106 extern tls_support tls_out;
109 extern BOOL gnutls_compat_mode; /* Less security, more compatibility */
110 extern BOOL gnutls_allow_auto_pkcs11; /* Let GnuTLS autoload PKCS11 modules */
111 extern uschar *openssl_options; /* OpenSSL compatibility options */
112 extern const pcre *regex_STARTTLS; /* For recognizing STARTTLS settings */
113 extern uschar *tls_certificate; /* Certificate file */
114 extern uschar *tls_channelbinding_b64; /* string of base64 channel binding */
115 extern uschar *tls_crl; /* CRL File */
116 extern int tls_dh_max_bits; /* don't accept higher lib suggestions */
117 extern uschar *tls_dhparam; /* DH param file */
118 extern uschar *tls_eccurve; /* EC curve */
119 # ifndef DISABLE_OCSP
120 extern uschar *tls_ocsp_file; /* OCSP stapling proof file */
122 extern uschar *tls_privatekey; /* Private key file */
123 extern BOOL tls_remember_esmtp; /* For YAEB */
124 extern uschar *tls_require_ciphers; /* So some can be avoided */
125 extern uschar *tls_try_verify_hosts; /* Optional client verification */
126 extern uschar *tls_verify_certificates;/* Path for certificates to check */
127 extern uschar *tls_verify_hosts; /* Mandatory client verification */
129 extern uschar *tls_advertise_hosts; /* host for which TLS is advertised */
131 extern uschar *dsn_envid; /* DSN envid string */
132 extern int dsn_ret; /* DSN ret type*/
133 extern const pcre *regex_DSN; /* For recognizing DSN settings */
134 extern uschar *dsn_advertise_hosts; /* host for which TLS is advertised */
136 /* Input-reading functions for messages, so we can use special ones for
139 extern int (*lwr_receive_getc)(unsigned);
140 extern uschar * (*lwr_receive_getbuf)(unsigned *);
141 extern int (*lwr_receive_ungetc)(int);
142 extern int (*receive_getc)(unsigned);
143 extern uschar * (*receive_getbuf)(unsigned *);
144 extern void (*receive_get_cache)(void);
145 extern int (*receive_ungetc)(int);
146 extern int (*receive_feof)(void);
147 extern int (*receive_ferror)(void);
148 extern BOOL (*receive_smtp_buffered)(void);
151 /* For clearing, saving, restoring address expansion variables. We have to have
152 the size of this vector set explicitly, because it is referenced from more than
155 extern const uschar **address_expansions[ADDRESS_EXPANSIONS_COUNT];
157 /* General global variables */
159 extern BOOL accept_8bitmime; /* Allow *BITMIME incoming */
160 extern uschar *add_environment; /* List of environment variables to add */
161 extern header_line *acl_added_headers; /* Headers added by an ACL */
162 extern tree_node *acl_anchor; /* Tree of named ACLs */
163 extern uschar *acl_arg[9]; /* Argument to ACL call */
164 extern int acl_narg; /* Number of arguments to ACL call */
165 extern int acl_level; /* Nesting depth and debug indent */
166 extern uschar *acl_not_smtp; /* ACL run for non-SMTP messages */
167 #ifdef WITH_CONTENT_SCAN
168 extern uschar *acl_not_smtp_mime; /* For MIME parts of ditto */
170 extern uschar *acl_not_smtp_start; /* ACL run at the beginning of a non-SMTP session */
171 extern uschar *acl_removed_headers; /* Headers deleted by an ACL */
172 extern uschar *acl_smtp_auth; /* ACL run for AUTH */
173 extern uschar *acl_smtp_connect; /* ACL run on SMTP connection */
174 extern uschar *acl_smtp_data; /* ACL run after DATA received */
176 extern uschar *acl_smtp_data_prdr; /* ACL run after DATA received if in PRDR mode*/
177 const extern pcre *regex_PRDR; /* For recognizing PRDR settings */
180 extern uschar *acl_smtp_dkim; /* ACL run for DKIM signatures / domains */
182 extern uschar *acl_smtp_etrn; /* ACL run for ETRN */
183 extern uschar *acl_smtp_expn; /* ACL run for EXPN */
184 extern uschar *acl_smtp_helo; /* ACL run for HELO/EHLO */
185 extern uschar *acl_smtp_mail; /* ACL run for MAIL */
186 extern uschar *acl_smtp_mailauth; /* ACL run for MAIL AUTH */
187 #ifdef WITH_CONTENT_SCAN
188 extern uschar *acl_smtp_mime; /* ACL run after DATA, before acl_smtp_data, for each MIME part */
190 extern uschar *acl_smtp_notquit; /* ACL run for disconnects */
191 extern uschar *acl_smtp_predata; /* ACL run for DATA command */
192 extern uschar *acl_smtp_quit; /* ACL run for QUIT */
193 extern uschar *acl_smtp_rcpt; /* ACL run for RCPT */
194 extern uschar *acl_smtp_starttls; /* ACL run for STARTTLS */
195 extern uschar *acl_smtp_vrfy; /* ACL run for VRFY */
196 extern BOOL acl_temp_details; /* TRUE to give details for 4xx error */
197 extern tree_node *acl_var_c; /* ACL connection variables */
198 extern tree_node *acl_var_m; /* ACL message variables */
199 extern uschar *acl_verify_message; /* User message for verify failure */
200 extern string_item *acl_warn_logged; /* Logged lines */
201 extern uschar *acl_wherecodes[]; /* Response codes for ACL fails */
202 extern uschar *acl_wherenames[]; /* Names for messages */
203 extern BOOL active_local_from_check;/* For adding Sender: (switchable) */
204 extern BOOL active_local_sender_retain; /* For keeping Sender: (switchable) */
205 extern address_item *addr_duplicate; /* Duplicate address list */
206 extern address_item address_defaults; /* Default data for address item */
207 extern uschar *address_file; /* Name of file when delivering to one */
208 extern uschar *address_pipe; /* Pipe command when delivering to one */
209 extern BOOL address_test_mode; /* True for -bt */
210 extern tree_node *addresslist_anchor; /* Tree of defined address lists */
211 extern int addresslist_count; /* Number defined */
212 extern gid_t *admin_groups; /* List of admin groups */
213 extern BOOL admin_user; /* True if caller can do admin */
214 extern BOOL allow_auth_unadvertised;/* As it says */
215 extern BOOL allow_domain_literals; /* As it says */
216 extern BOOL allow_mx_to_ip; /* Allow MX records to -> ip address */
217 extern BOOL allow_unqualified_recipient; /* As it says */
218 extern BOOL allow_unqualified_sender; /* Ditto */
219 #ifdef EXPERIMENTAL_ARC
220 struct arc_set *arc_received; /* highest ARC instance evaluation struct */
221 extern int arc_received_instance; /* highest ARC instance number in headers */
222 extern int arc_oldest_pass; /* lowest passing instance number in headers */
223 extern const uschar *arc_state; /* verification state */
224 extern const uschar *arc_state_reason;
226 extern BOOL allow_utf8_domains; /* For experimenting */
227 extern uschar *authenticated_fail_id; /* ID that failed authentication */
228 extern uschar *authenticated_id; /* ID that was authenticated */
229 extern uschar *authenticated_sender; /* From AUTH on MAIL */
230 extern BOOL authentication_failed; /* TRUE if AUTH was tried and failed */
231 extern BOOL authentication_local; /* TRUE if non-smtp (implicit authentication) */
232 extern uschar *auth_advertise_hosts; /* Only advertise to these */
233 extern auth_info auths_available[]; /* Vector of available auth mechanisms */
234 extern auth_instance *auths; /* Chain of instantiated auths */
235 extern auth_instance auth_defaults; /* Default values */
236 extern uschar *auth_defer_msg; /* Error message for log */
237 extern uschar *auth_defer_user_msg; /* Error message for user */
238 extern uschar *auth_vars[]; /* $authn variables */
239 extern int auto_thaw; /* Auto-thaw interval */
240 #ifdef WITH_CONTENT_SCAN
241 extern BOOL av_failed; /* TRUE if the AV process failed */
242 extern uschar *av_scanner; /* AntiVirus scanner to use for the malware condition */
245 extern BOOL background_daemon; /* Set FALSE to keep in foreground */
246 extern uschar *base62_chars; /* Table of base-62 characters */
247 extern uschar *bi_command; /* Command for -bi option */
248 extern uschar *big_buffer; /* Used for various temp things */
249 extern int big_buffer_size; /* Current size (can expand) */
250 #ifdef EXPERIMENTAL_BRIGHTMAIL
251 extern uschar *bmi_alt_location; /* expansion variable that contains the alternate location for the rcpt (available during routing) */
252 extern uschar *bmi_base64_tracker_verdict; /* expansion variable with base-64 encoded OLD verdict string (available during routing) */
253 extern uschar *bmi_base64_verdict; /* expansion variable with base-64 encoded verdict string (available during routing) */
254 extern uschar *bmi_config_file; /* Brightmail config file */
255 extern int bmi_deliver; /* Flag that determines if the message should be delivered to the rcpt (available during routing) */
256 extern int bmi_run; /* Flag that determines if message should be run through Brightmail server */
257 extern uschar *bmi_verdicts; /* BASE64-encoded verdicts with recipient lists */
259 extern int bsmtp_transaction_linecount; /* Start of last transaction */
260 extern int body_8bitmime; /* sender declared BODY= ; 7=7BIT, 8=8BITMIME */
261 extern uschar *bounce_message_file; /* Template file */
262 extern uschar *bounce_message_text; /* One-liner */
263 extern uschar *bounce_recipient; /* When writing an errmsg */
264 extern BOOL bounce_return_body; /* Include body in returned message */
265 extern int bounce_return_linesize_limit; /* Max line length in return */
266 extern BOOL bounce_return_message; /* Include message in bounce */
267 extern int bounce_return_size_limit; /* Max amount to return */
268 extern uschar *bounce_sender_authentication; /* AUTH address for bounces */
270 extern uschar *callout_address; /* Address used for a malware/spamd/verify etc. callout */
271 extern int callout_cache_domain_positive_expire; /* Time for positive domain callout cache records to expire */
272 extern int callout_cache_domain_negative_expire; /* Time for negative domain callout cache records to expire */
273 extern int callout_cache_positive_expire; /* Time for positive callout cache records to expire */
274 extern int callout_cache_negative_expire; /* Time for negative callout cache records to expire */
275 extern uschar *callout_random_local_part; /* Local part to be used to check if server called will accept any local part */
276 extern uschar *check_dns_names_pattern;/* Regex for syntax check */
277 extern int check_log_inodes; /* Minimum for message acceptance */
278 extern int check_log_space; /* Minimum for message acceptance */
279 extern BOOL check_rfc2047_length; /* Check RFC 2047 encoded string length */
280 extern int check_spool_inodes; /* Minimum for message acceptance */
281 extern int check_spool_space; /* Minimum for message acceptance */
282 extern uschar *chunking_advertise_hosts; /* RFC 3030 CHUNKING */
283 extern unsigned chunking_datasize;
284 extern unsigned chunking_data_left;
285 extern BOOL chunking_offered;
286 extern chunking_state_t chunking_state;
287 extern uschar *client_authenticator; /* Authenticator name used for smtp delivery */
288 extern uschar *client_authenticated_id; /* "login" name used for SMTP AUTH */
289 extern uschar *client_authenticated_sender; /* AUTH option to SMTP MAIL FROM (not yet used) */
290 extern int clmacro_count; /* Number of command line macros */
291 extern uschar *clmacros[]; /* Copy of them, for re-exec */
292 extern BOOL commandline_checks_require_admin; /* belt and braces for insecure setups */
293 extern int connection_max_messages;/* Max down one SMTP connection */
294 extern BOOL config_changed; /* True if -C used */
295 extern FILE *config_file; /* Configuration file */
296 extern const uschar *config_filename; /* Configuration file name */
297 extern gid_t config_gid; /* Additional group owner */
298 extern int config_lineno; /* Line number */
299 extern uschar *config_main_filelist; /* List of possible config files */
300 extern uschar *config_main_filename; /* File name actually used */
301 extern uschar *config_main_directory; /* Directory where the main config file was found */
302 extern uid_t config_uid; /* Additional owner */
303 extern uschar *continue_proxy_cipher; /* TLS cipher for proxied continued delivery */
304 extern uschar *continue_hostname; /* Host for continued delivery */
305 extern uschar *continue_host_address; /* IP address for ditto */
306 extern BOOL continue_more; /* Flag more addresses waiting */
307 extern int continue_sequence; /* Sequence num for continued delivery */
308 extern uschar *continue_transport; /* Transport for continued delivery */
310 extern uschar *csa_status; /* Client SMTP Authorization result */
313 unsigned callout_hold_only:1; /* Conn is only for verify callout */
314 unsigned delivery:1; /* When to attempt */
315 unsigned defer_pass:1; /* Pass 4xx to caller rather than spooling */
316 unsigned is_tls:1; /* Conn has TLS active */
317 int fd; /* Open connection */
318 int nrcpt; /* Count of addresses */
319 uschar * transport; /* Name of transport */
320 uschar * interface; /* (address of) */
321 uschar * snd_ip; /* sending_ip_address */
322 int snd_port; /* sending_port */
323 unsigned peer_options; /* smtp_peer_options */
324 host_item host; /* Host used */
325 address_item addr; /* (Chain of) addresses */
327 extern cut_t cutthrough; /* Deliver-concurrently */
329 extern BOOL daemon_listen; /* True if listening required */
330 extern uschar *daemon_smtp_port; /* Can be a list of ports */
331 extern int daemon_startup_retries; /* Number of times to retry */
332 extern int daemon_startup_sleep; /* Sleep between retries */
334 #ifdef EXPERIMENTAL_DCC
335 extern BOOL dcc_direct_add_header; /* directly add header */
336 extern uschar *dcc_header; /* dcc header */
337 extern uschar *dcc_result; /* dcc result */
338 extern uschar *dccifd_address; /* address of the dccifd daemon */
339 extern uschar *dccifd_options; /* options for the dccifd daemon */
342 extern BOOL debug_daemon; /* Debug the daemon process only */
343 extern int debug_fd; /* The fd for debug_file */
344 extern FILE *debug_file; /* Where to write debugging info */
345 extern int debug_notall[]; /* Debug options excluded from +all */
346 extern bit_table debug_options[]; /* Table of debug options */
347 extern int debug_options_count; /* Size of table */
348 extern BOOL debug_store; /* Do extra checks on store_reset */
349 extern int delay_warning[]; /* Times between warnings */
350 extern uschar *delay_warning_condition; /* Condition string for warnings */
351 extern BOOL delivery_date_remove; /* Remove delivery-date headers */
353 extern uschar *deliver_address_data; /* Arbitrary data for an address */
354 extern int deliver_datafile; /* FD for data part of message */
355 extern const uschar *deliver_domain; /* The local domain for delivery */
356 extern uschar *deliver_domain_data; /* From domain lookup */
357 extern const uschar *deliver_domain_orig; /* The original local domain for delivery */
358 extern const uschar *deliver_domain_parent; /* The parent domain for delivery */
359 extern BOOL deliver_drop_privilege; /* TRUE for unprivileged delivery */
360 extern BOOL deliver_firsttime; /* True for first delivery attempt */
361 extern BOOL deliver_force; /* TRUE if delivery was forced */
362 extern BOOL deliver_freeze; /* TRUE if delivery is frozen */
363 extern time_t deliver_frozen_at; /* Time of freezing */
364 extern uschar *deliver_home; /* Home directory for pipes */
365 extern const uschar *deliver_host; /* (First) host for routed local deliveries */
366 /* Remote host for filter */
367 extern const uschar *deliver_host_address; /* Address for remote delivery filter */
368 extern int deliver_host_port; /* Address for remote delivery filter */
369 extern uschar *deliver_in_buffer; /* Buffer for copying file */
370 extern ino_t deliver_inode; /* Inode for appendfile */
371 extern uschar *deliver_localpart; /* The local part for delivery */
372 extern uschar *deliver_localpart_data; /* From local part lookup */
373 extern uschar *deliver_localpart_orig; /* The original local part for delivery */
374 extern uschar *deliver_localpart_parent; /* The parent local part for delivery */
375 extern uschar *deliver_localpart_prefix; /* The stripped prefix, if any */
376 extern uschar *deliver_localpart_suffix; /* The stripped suffix, if any */
377 extern BOOL deliver_force_thaw; /* TRUE to force thaw in queue run */
378 extern BOOL deliver_manual_thaw; /* TRUE if manually thawed */
379 extern uschar *deliver_out_buffer; /* Buffer for copying file */
380 extern int deliver_queue_load_max; /* Different value for queue running */
381 extern address_item *deliver_recipients; /* Current set of addresses */
382 extern uschar *deliver_selectstring; /* For selecting by recipient */
383 extern BOOL deliver_selectstring_regex; /* String is regex */
384 extern uschar *deliver_selectstring_sender; /* For selecting by sender */
385 extern BOOL deliver_selectstring_sender_regex; /* String is regex */
386 extern BOOL disable_callout_flush; /* Don't flush before callouts */
387 extern BOOL disable_delay_flush; /* Don't flush before "delay" in ACL */
388 #ifdef ENABLE_DISABLE_FSYNC
389 extern BOOL disable_fsync; /* Not for normal use */
391 extern BOOL disable_ipv6; /* Don't do any IPv6 things */
392 extern BOOL disable_logging; /* Disables log writing when TRUE */
395 extern BOOL dkim_collect_input; /* Runtime flag that tracks wether SMTP input is fed to DKIM validation */
396 extern uschar *dkim_cur_signer; /* Expansion variable, holds the current "signer" domain or identity during a acl_smtp_dkim run */
397 extern BOOL dkim_disable_verify; /* Set via ACL control statement. When set, DKIM verification is disabled for the current message */
398 extern int dkim_key_length; /* Expansion variable, length of signing key in bits */
399 extern uschar *dkim_signers; /* Expansion variable, holds colon-separated list of domains and identities that have signed a message */
400 extern uschar *dkim_signing_domain; /* Expansion variable, domain used for signing a message. */
401 extern uschar *dkim_signing_selector; /* Expansion variable, selector used for signing a message. */
402 extern uschar *dkim_verify_overall; /* First successful domain verified, or null */
403 extern uschar *dkim_verify_signers; /* Colon-separated list of domains for each of which we call the DKIM ACL */
404 extern uschar *dkim_verify_status; /* result for this signature */
405 extern uschar *dkim_verify_reason; /* result for this signature */
407 #ifdef EXPERIMENTAL_DMARC
408 extern BOOL dmarc_has_been_checked; /* Global variable to check if test has been called yet */
409 extern uschar *dmarc_domain_policy; /* Expansion for declared policy of used domain */
410 extern uschar *dmarc_forensic_sender; /* Set sender address for forensic reports */
411 extern uschar *dmarc_history_file; /* Expansion variable, file to store dmarc results */
412 extern uschar *dmarc_status; /* Expansion variable, one word value */
413 extern uschar *dmarc_status_text; /* Expansion variable, human readable value */
414 extern uschar *dmarc_tld_file; /* Mozilla TLDs text file */
415 extern uschar *dmarc_used_domain; /* Expansion variable, domain libopendmarc chose for DMARC policy lookup */
416 extern BOOL dmarc_disable_verify; /* Set via ACL control statement. When set, DMARC verification is disabled for the current message */
417 extern BOOL dmarc_enable_forensic; /* Set via ACL control statement. When set, DMARC forensic reports are enabled for the current message */
420 extern uschar *dns_again_means_nonexist; /* Domains that are badly set up */
421 extern int dns_csa_search_limit; /* How deep to search for CSA SRV records */
422 extern BOOL dns_csa_use_reverse; /* Check CSA in reverse DNS? (non-standard) */
423 extern uschar *dns_ipv4_lookup; /* For these domains, don't look for AAAA (or A6) */
425 extern int dns_dane_ok; /* Ok to use DANE when checking TLS authenticity */
427 extern int dns_retrans; /* Retransmission time setting */
428 extern int dns_retry; /* Number of retries */
429 extern int dns_dnssec_ok; /* When constructing DNS query, set DO flag */
430 extern uschar *dns_trust_aa; /* DNSSEC trust AA as AD */
431 extern int dns_use_edns0; /* Coerce EDNS0 support on/off in resolver. */
432 extern uschar *dnslist_domain; /* DNS (black) list domain */
433 extern uschar *dnslist_matched; /* DNS (black) list matched key */
434 extern uschar *dnslist_text; /* DNS (black) list text message */
435 extern uschar *dnslist_value; /* DNS (black) list IP address */
436 extern tree_node *domainlist_anchor; /* Tree of defined domain lists */
437 extern int domainlist_count; /* Number defined */
438 extern BOOL dont_deliver; /* TRUE for -N option */
439 extern BOOL dot_ends; /* TRUE if "." ends non-SMTP input */
441 /* This option is now a no-opt, retained for compatibility */
442 extern BOOL drop_cr; /* For broken local MUAs */
444 extern uschar *dsn_from; /* From: string for DSNs */
446 extern BOOL enable_dollar_recipients; /* Make $recipients available */
447 extern BOOL envelope_to_remove; /* Remove envelope_to_headers */
448 extern int errno_quota; /* Quota errno in this OS */
449 extern int error_handling; /* Error handling style */
450 extern uschar *errors_copy; /* For taking copies of errors */
451 extern uschar *errors_reply_to; /* Reply-to for error messages */
452 extern int errors_sender_rc; /* Return after message to sender*/
454 #ifndef DISABLE_EVENT
455 extern uschar *event_action; /* expansion for delivery events */
456 extern uschar *event_data; /* event data */
457 extern int event_defer_errno; /* error number set when a remote delivery is deferred with a host error */
458 extern const uschar *event_name; /* event classification */
461 extern gid_t exim_gid; /* To be used with exim_uid */
462 extern BOOL exim_gid_set; /* TRUE if exim_gid set */
463 extern uschar *exim_path; /* Path to exec exim */
464 extern const uschar *exim_sieve_extension_list[]; /* list of sieve extensions */
465 extern uid_t exim_uid; /* Non-root uid for exim */
466 extern BOOL exim_uid_set; /* TRUE if exim_uid set */
467 extern int expand_level; /* Nesting depth; indent for debug */
468 extern int expand_forbid; /* RDO flags for forbidding things */
469 extern int expand_nlength[]; /* Lengths of numbered strings */
470 extern int expand_nmax; /* Max numerical value */
471 extern uschar *expand_nstring[]; /* Numbered strings */
472 extern BOOL expand_string_forcedfail; /* TRUE if failure was "expected" */
473 extern BOOL extract_addresses_remove_arguments; /* Controls -t behaviour */
474 extern uschar *extra_local_interfaces; /* Local, non-listen interfaces */
476 extern int fake_response; /* Fake FAIL or DEFER response to data */
477 extern uschar *fake_response_text; /* User defined message for the above. Default is in globals.c. */
478 extern int filter_n[FILTER_VARIABLE_COUNT]; /* filter variables */
479 extern BOOL filter_running; /* TRUE while running a filter */
480 extern int filter_sn[FILTER_VARIABLE_COUNT]; /* variables set by system filter */
481 extern int filter_test; /* Filter test type */
482 extern uschar *filter_test_sfile; /* System filter test file */
483 extern uschar *filter_test_ufile; /* User filter test file */
484 extern uschar *filter_thisaddress; /* For address looping */
485 extern int finduser_retries; /* Retry count for getpwnam() */
486 extern uid_t fixed_never_users[]; /* Can't be overridden */
487 extern uschar *freeze_tell; /* Message on (some) freezings */
488 extern uschar *freeze_tell_config; /* The configured setting */
489 extern uschar *fudged_queue_times; /* For use in test harness */
491 extern uschar *gecos_name; /* To be expanded when pattern matches */
492 extern uschar *gecos_pattern; /* Pattern to match */
493 extern rewrite_rule *global_rewrite_rules; /* Chain of rewriting rules */
495 extern int header_insert_maxlen; /* Max for inserting headers */
496 extern int header_maxsize; /* Max total length for header */
497 extern int header_line_maxsize; /* Max for an individual line */
498 extern header_name header_names[]; /* Table of header names */
499 extern int header_names_size; /* Number of entries */
500 extern BOOL header_rewritten; /* TRUE if header changed by router */
501 extern uschar *helo_accept_junk_hosts; /* Allowed to use junk arg */
502 extern uschar *helo_allow_chars; /* Rogue chars to allow in HELO/EHLO */
503 extern uschar *helo_lookup_domains; /* If these given, lookup host name */
504 extern uschar *helo_try_verify_hosts; /* Soft check HELO argument for these */
505 extern BOOL helo_verified; /* True if HELO verified */
506 extern BOOL helo_verify_failed; /* True if attempt failed */
507 extern uschar *helo_verify_hosts; /* Hard check HELO argument for these */
508 extern const uschar *hex_digits; /* Used in several places */
509 extern uschar *hold_domains; /* Hold up deliveries to these */
510 extern BOOL host_find_failed_syntax;/* DNS syntax check failure */
511 extern BOOL host_checking_callout; /* TRUE if real callout wanted */
512 extern uschar *host_data; /* Obtained from lookup in ACL */
513 extern uschar *host_lookup; /* For which IP addresses are always looked up */
514 extern BOOL host_lookup_deferred; /* TRUE if lookup deferred */
515 extern BOOL host_lookup_failed; /* TRUE if lookup failed */
516 extern uschar *host_lookup_order; /* Order of host lookup types */
517 extern uschar *host_lookup_msg; /* Text for why it failed */
518 extern int host_number; /* For sharing spools */
519 extern uschar *host_number_string; /* For expanding */
520 extern uschar *host_reject_connection; /* Reject these hosts */
521 extern tree_node *hostlist_anchor; /* Tree of defined host lists */
522 extern int hostlist_count; /* Number defined */
523 extern uschar *hosts_connection_nolog; /* Limits the logging option */
524 extern uschar *hosts_treat_as_local; /* For routing */
526 extern int ignore_bounce_errors_after; /* Keep them for this time. */
527 extern BOOL ignore_fromline_local; /* Local SMTP ignore fromline */
528 extern uschar *ignore_fromline_hosts; /* Hosts permitted to send "From " */
529 extern BOOL inetd_wait_mode; /* Whether running in inetd wait mode */
530 extern int inetd_wait_timeout; /* Timeout for inetd wait mode */
531 extern uschar *initial_cwd; /* The directory we where in at startup */
532 extern BOOL is_inetd; /* True for inetd calls */
533 extern uschar *iterate_item; /* Item from iterate list */
535 extern int journal_fd; /* Fd for journal file */
537 extern uschar *keep_environment; /* Whitelist for environment variables */
538 extern int keep_malformed; /* Time to keep malformed messages */
540 extern uschar *eldap_dn; /* Where LDAP DNs are left */
541 extern int load_average; /* Most recently read load average */
542 extern BOOL local_error_message; /* True if handling one of these */
543 extern BOOL local_from_check; /* For adding Sender: (global value) */
544 extern uschar *local_from_prefix; /* Permitted prefixes */
545 extern uschar *local_from_suffix; /* Permitted suffixes */
546 extern uschar *local_interfaces; /* For forcing specific interfaces */
547 extern uschar *local_scan_data; /* Text returned by local_scan() */
548 extern optionlist local_scan_options[];/* Option list for local_scan() */
549 extern int local_scan_options_count; /* Size of the list */
550 extern int local_scan_timeout; /* Timeout for local_scan() */
551 extern BOOL local_sender_retain; /* Retain Sender: (with no From: check) */
552 extern gid_t local_user_gid; /* As it says; may be set in routers */
553 extern uid_t local_user_uid; /* As it says; may be set in routers */
554 extern tree_node *localpartlist_anchor;/* Tree of defined localpart lists */
555 extern int localpartlist_count; /* Number defined */
556 extern uschar *log_buffer; /* For constructing log entries */
557 extern int log_default[]; /* Initialization list for log_selector */
558 extern uschar *log_file_path; /* If unset, use default */
559 extern int log_notall[]; /* Log options excluded from +all */
560 extern bit_table log_options[]; /* Table of options */
561 extern int log_options_count; /* Size of table */
562 extern int log_reject_target; /* Target log for ACL rejections */
563 extern unsigned int log_selector[]; /* Bit map of logging options */
564 extern uschar *log_selector_string; /* As supplied in the config */
565 extern FILE *log_stderr; /* Copy of stderr for log use, or NULL */
566 extern BOOL log_testing_mode; /* TRUE in various testing modes */
567 extern BOOL log_timezone; /* TRUE to include the timezone in log lines */
568 extern uschar *login_sender_address; /* The actual sender address */
569 extern lookup_info **lookup_list; /* Array of pointers to available lookups */
570 extern int lookup_list_count; /* Number of entries in the list */
571 extern uschar *lookup_dnssec_authenticated; /* AD status of dns lookup */
572 extern int lookup_open_max; /* Max lookup files to cache */
573 extern uschar *lookup_value; /* Value looked up from file */
575 extern macro_item *macros; /* Configuration macros */
576 extern macro_item *macros_user; /* Non-builtin configuration macros */
577 extern macro_item *mlast; /* Last item in macro list */
578 extern uschar *mailstore_basename; /* For mailstore deliveries */
579 #ifdef WITH_CONTENT_SCAN
580 extern uschar *malware_name; /* Name of virus or malware ("W32/Klez-H") */
582 extern int max_received_linelength;/* What it says */
583 extern int max_username_length; /* For systems with broken getpwnam() */
584 extern int message_age; /* In seconds */
585 extern uschar *message_body; /* Start of message body for filter */
586 extern uschar *message_body_end; /* End of message body for filter */
587 extern BOOL message_body_newlines; /* FALSE => remove newlines */
588 extern int message_body_size; /* Sic */
589 extern int message_body_visible; /* Amount visible in message_body */
590 extern int message_ended; /* State of message reading and how ended */
591 extern uschar *message_headers; /* When built */
592 extern uschar message_id_option[]; /* -E<message-id> for use as option */
593 extern uschar *message_id_external; /* External form of following */
594 extern uschar *message_id_domain; /* Expanded to form domain-part of message_id */
595 extern uschar *message_id_text; /* Expanded to form message_id */
596 extern struct timeval message_id_tv; /* Time used to create last message_id */
597 extern int message_linecount; /* As it says */
598 extern BOOL message_logs; /* TRUE to write message logs */
599 extern int message_size; /* Size of message */
600 extern uschar *message_size_limit; /* As it says */
602 extern BOOL message_smtputf8; /* Internationalized mail handling */
603 extern int message_utf8_downconvert; /* convert from utf8 */
604 const extern pcre *regex_UTF8; /* For recognizing SMTPUTF8 settings */
606 extern uschar message_subdir[]; /* Subdirectory for messages */
607 extern uschar *message_reference; /* Reference for error messages */
609 /* MIME ACL expandables */
610 #ifdef WITH_CONTENT_SCAN
611 extern int mime_anomaly_level;
612 extern const uschar *mime_anomaly_text;
613 extern uschar *mime_boundary;
614 extern uschar *mime_charset;
615 extern uschar *mime_content_description;
616 extern uschar *mime_content_disposition;
617 extern uschar *mime_content_id;
618 extern unsigned int mime_content_size;
619 extern uschar *mime_content_transfer_encoding;
620 extern uschar *mime_content_type;
621 extern uschar *mime_decoded_filename;
622 extern uschar *mime_filename;
623 extern int mime_is_multipart;
624 extern int mime_is_coverletter;
625 extern int mime_is_rfc822;
626 extern int mime_part_count;
629 extern BOOL mua_wrapper; /* TRUE when Exim is wrapping an MUA */
631 extern uid_t *never_users; /* List of uids never to be used */
632 #ifdef WITH_CONTENT_SCAN
633 extern BOOL no_mbox_unspool; /* don't unlink files in /scan directory */
635 extern BOOL no_multiline_responses; /* For broken clients */
637 extern const int on; /* For setsockopt */
638 extern const int off;
640 extern optionlist optionlist_auths[]; /* These option lists are made */
641 extern int optionlist_auths_size; /* global so that readconf can */
642 extern optionlist optionlist_routers[]; /* see them for printing out */
643 extern int optionlist_routers_size; /* the options. */
644 extern optionlist optionlist_transports[];
645 extern int optionlist_transports_size;
647 extern uid_t original_euid; /* Original effective uid */
648 extern gid_t originator_gid; /* Gid of whoever wrote spool file */
649 extern uschar *originator_login; /* Login of same */
650 extern uschar *originator_name; /* Full name of same */
651 extern uid_t originator_uid; /* Uid of ditto */
652 extern uschar *override_local_interfaces; /* Value of -oX argument */
653 extern uschar *override_pid_file_path; /* Value of -oP argument */
655 extern BOOL parse_allow_group; /* Allow group syntax */
656 extern BOOL parse_found_group; /* In the middle of a group */
657 extern uschar *percent_hack_domains; /* Local domains for which '% operates */
658 extern uschar *pid_file_path; /* For writing daemon pids */
659 extern uschar *pipelining_advertise_hosts; /* As it says */
660 extern BOOL pipelining_enable; /* As it says */
662 extern BOOL prdr_enable; /* As it says */
663 extern BOOL prdr_requested; /* Connecting mail server wants PRDR */
665 extern BOOL preserve_message_logs; /* Save msglog files */
666 extern uschar *primary_hostname; /* Primary name of this computer */
667 extern BOOL print_topbitchars; /* Topbit chars are printing chars */
668 extern uschar process_info[]; /* For SIGUSR1 output */
669 extern int process_info_len;
670 extern uschar *process_log_path; /* Alternate path */
671 extern BOOL prod_requires_admin; /* TRUE if prodding requires admin */
673 #if defined(SUPPORT_PROXY) || defined(SUPPORT_SOCKS)
674 extern uschar *hosts_proxy; /* Hostlist which (require) use proxy protocol */
675 extern uschar *proxy_external_address; /* IP of remote interface of proxy */
676 extern int proxy_external_port; /* Port on remote interface of proxy */
677 extern uschar *proxy_local_address; /* IP of local interface of proxy */
678 extern int proxy_local_port; /* Port on local interface of proxy */
679 extern BOOL proxy_session; /* TRUE if receiving mail from valid proxy */
680 extern BOOL proxy_session_failed; /* TRUE if required proxy negotiation failed */
683 extern uschar *prvscheck_address; /* Set during prvscheck expansion item */
684 extern uschar *prvscheck_keynum; /* Set during prvscheck expansion item */
685 extern uschar *prvscheck_result; /* Set during prvscheck expansion item */
687 extern const uschar *qualify_domain_recipient; /* Domain to qualify recipients with */
688 extern uschar *qualify_domain_sender; /* Domain to qualify senders with */
689 extern BOOL queue_2stage; /* Run queue in 2-stage manner */
690 extern uschar *queue_domains; /* Queue these domains */
691 extern BOOL queue_list_requires_admin; /* TRUE if -bp requires admin */
692 extern BOOL queue_run_first_delivery; /* If TRUE, first deliveries only */
693 extern BOOL queue_run_force; /* TRUE to force during queue run */
694 extern BOOL queue_run_local; /* Local deliveries only in queue run */
695 extern BOOL queue_running; /* TRUE for queue running process and */
696 /* immediate children */
697 extern pid_t queue_run_pid; /* PID of the queue running process or 0 */
698 extern int queue_run_pipe; /* Pipe for synchronizing */
699 extern int queue_interval; /* Queue running interval */
700 extern uschar *queue_name; /* Name of queue, if nondefault spooling */
701 extern BOOL queue_only; /* TRUE to disable immediate delivery */
702 extern int queue_only_load; /* Max load before auto-queue */
703 extern BOOL queue_only_load_latch; /* Latch queue_only_load TRUE */
704 extern uschar *queue_only_file; /* Queue if file exists/not-exists */
705 extern BOOL queue_only_override; /* Allow override from command line */
706 extern BOOL queue_only_policy; /* ACL or local_scan wants queue_only */
707 extern BOOL queue_run_in_order; /* As opposed to random */
708 extern uschar *queue_run_max; /* Max queue runners */
709 extern BOOL queue_smtp; /* Disable all immediate SMTP (-odqs)*/
710 extern uschar *queue_smtp_domains; /* Ditto, for these domains */
712 extern unsigned int random_seed; /* Seed for random numbers */
713 extern tree_node *ratelimiters_cmd; /* Results of command ratelimit checks */
714 extern tree_node *ratelimiters_conn; /* Results of connection ratelimit checks */
715 extern tree_node *ratelimiters_mail; /* Results of per-mail ratelimit checks */
716 extern uschar *raw_active_hostname; /* Pre-expansion */
717 extern uschar *raw_sender; /* Before rewriting */
718 extern uschar **raw_recipients; /* Before rewriting */
719 extern int raw_recipients_count;
720 extern int rcpt_count; /* Count of RCPT commands in a message */
721 extern int rcpt_fail_count; /* Those that got 5xx */
722 extern int rcpt_defer_count; /* Those that got 4xx */
723 extern gid_t real_gid; /* Real gid */
724 extern uid_t real_uid; /* Real user running program */
725 extern BOOL really_exim; /* FALSE in utilities */
726 extern BOOL receive_call_bombout; /* Flag for crashing log */
727 extern int receive_linecount; /* Mainly for BSMTP errors */
728 extern int receive_messagecount; /* Mainly for BSMTP errors */
729 extern int receive_timeout; /* For non-SMTP acceptance */
730 extern int received_count; /* Count of Received: headers */
731 extern uschar *received_for; /* For "for" field */
732 extern uschar *received_header_text; /* Definition of Received: header */
733 extern int received_headers_max; /* Max count of Received: headers */
734 extern struct timeval received_time; /* Time the message was received */
735 extern struct timeval received_time_taken; /* Interval the message took to be received */
736 extern uschar *recipient_data; /* lookup data for recipients */
737 extern uschar *recipient_unqualified_hosts; /* Permitted unqualified recipients */
738 extern uschar *recipient_verify_failure; /* What went wrong */
739 extern BOOL recipients_discarded; /* By an ACL */
740 extern int recipients_list_max; /* Maximum number fitting in list */
741 extern int recipients_max; /* Max permitted */
742 extern BOOL recipients_max_reject; /* If TRUE, reject whole message */
743 extern const pcre *regex_AUTH; /* For recognizing AUTH settings */
744 extern const pcre *regex_check_dns_names; /* For DNS name checking */
745 extern const pcre *regex_From; /* For recognizing "From_" lines */
746 extern const pcre *regex_CHUNKING; /* For recognizing CHUNKING (RFC 3030) */
747 extern const pcre *regex_IGNOREQUOTA; /* For recognizing IGNOREQUOTA (LMTP) */
748 extern const pcre *regex_PIPELINING; /* For recognizing PIPELINING */
749 extern const pcre *regex_SIZE; /* For recognizing SIZE settings */
750 extern const pcre *regex_ismsgid; /* Compiled r.e. for message it */
751 extern const pcre *regex_smtp_code; /* For recognizing SMTP codes */
752 extern uschar *regex_vars[]; /* $regexN variables */
753 #ifdef WHITELIST_D_MACROS
754 extern const pcre *regex_whitelisted_macro; /* For -D macro values */
756 #ifdef WITH_CONTENT_SCAN
757 extern uschar *regex_match_string; /* regex that matched a line (regex ACL condition) */
759 extern int remote_delivery_count; /* Number of remote addresses */
760 extern int remote_max_parallel; /* Maximum parallel delivery */
761 extern uschar *remote_sort_domains; /* Remote domain sorting order */
762 extern retry_config *retries; /* Chain of retry config information */
763 extern int retry_data_expire; /* When to expire retry data */
764 extern int retry_interval_max; /* Absolute maximum */
765 extern int retry_maximum_timeout; /* The maximum timeout */
766 extern uschar *return_path; /* Return path for a message */
767 extern BOOL return_path_remove; /* Remove return-path headers */
768 extern int rewrite_existflags; /* Indicate which headers have rewrites */
769 extern uschar *rfc1413_hosts; /* RFC hosts */
770 extern int rfc1413_query_timeout; /* Timeout on RFC 1413 calls */
771 /* extern BOOL rfc821_domains; */ /* If set, syntax is 821, not 822 => being abolished */
772 extern uid_t root_gid; /* The gid for root */
773 extern uid_t root_uid; /* The uid for root */
774 extern router_info routers_available[];/* Vector of available routers */
775 extern router_instance *routers; /* Chain of instantiated routers */
776 extern router_instance router_defaults;/* Default values */
777 extern uschar *router_name; /* Name of router last started */
778 extern BOOL running_in_test_harness; /*TRUE when running_status is patched */
779 extern ip_address_item *running_interfaces; /* Host's running interfaces */
780 extern uschar *running_status; /* Flag string for testing */
781 extern int runrc; /* rc from ${run} */
783 extern uschar *search_error_message; /* Details of lookup problem */
784 extern BOOL search_find_defer; /* Set TRUE if lookup deferred */
785 extern uschar *self_hostname; /* Self host after routing->directors */
786 extern unsigned int sender_address_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for sender */
787 extern uschar *sender_address_data; /* address_data from sender verify */
788 extern BOOL sender_address_forced; /* Set by -f */
789 extern uschar *sender_address_unrewritten; /* Set if rewritten by verify */
790 extern uschar *sender_data; /* lookup result for senders */
791 extern unsigned int sender_domain_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for sender domain */
792 extern uschar *sender_fullhost; /* Sender host name + address */
793 extern BOOL sender_helo_dnssec; /* True if HELO verify used DNS and was DNSSEC */
794 extern uschar *sender_helo_name; /* Host name from HELO/EHLO */
795 extern uschar **sender_host_aliases; /* Points to list of alias names */
796 extern uschar *sender_host_auth_pubname; /* Public-name of authentication method */
797 extern unsigned int sender_host_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for incoming host */
798 extern BOOL sender_host_dnssec; /* true if sender_host_name verified in DNSSEC */
799 extern BOOL sender_host_notsocket; /* Set for -bs and -bS */
800 extern BOOL sender_host_unknown; /* TRUE for -bs and -bS except inetd */
801 extern uschar *sender_ident; /* Sender identity via RFC 1413 */
802 extern BOOL sender_local; /* TRUE for local senders */
803 extern BOOL sender_name_forced; /* Set by -F */
804 extern uschar *sender_rate; /* Sender rate computed by ACL */
805 extern uschar *sender_rate_limit; /* Configured rate limit */
806 extern uschar *sender_rate_period; /* Configured smoothing period */
807 extern uschar *sender_rcvhost; /* Host data for Received: */
808 extern BOOL sender_set_untrusted; /* Sender set by untrusted caller */
809 extern uschar *sender_unqualified_hosts; /* Permitted unqualified senders */
810 extern uschar *sender_verify_failure; /* What went wrong */
811 extern address_item *sender_verified_list; /* Saved chain of sender verifies */
812 extern address_item *sender_verified_failed; /* The one that caused denial */
813 extern uschar *sending_ip_address; /* Address of outgoing (SMTP) interface */
814 extern int sending_port; /* Port of outgoing interface */
815 extern SIGNAL_BOOL sigalrm_seen; /* Flag for sigalrm_handler */
816 extern uschar **sighup_argv; /* Args for re-execing after SIGHUP */
817 extern int slow_lookup_log; /* Log DNS lookups taking longer than N millisecs */
818 extern int smtp_accept_count; /* Count of connections */
819 extern BOOL smtp_accept_keepalive; /* Set keepalive on incoming */
820 extern int smtp_accept_max; /* Max SMTP connections */
821 extern int smtp_accept_max_nonmail;/* Max non-mail commands in one con */
822 extern uschar *smtp_accept_max_nonmail_hosts; /* Limit non-mail cmds from these hosts */
823 extern int smtp_accept_max_per_connection; /* Max msgs per connection */
824 extern uschar *smtp_accept_max_per_host; /* Max SMTP cons from one IP addr */
825 extern int smtp_accept_queue; /* Queue after so many connections */
826 extern int smtp_accept_queue_per_connection; /* Queue after so many msgs */
827 extern int smtp_accept_reserve; /* Reserve these SMTP connections */
828 extern uschar *smtp_active_hostname; /* Hostname for this message */
829 extern BOOL smtp_authenticated; /* Sending client has authenticated */
830 extern uschar *smtp_banner; /* Banner string (to be expanded) */
831 extern BOOL smtp_check_spool_space; /* TRUE to check SMTP SIZE value */
832 extern int smtp_ch_index; /* Index in smtp_connection_had */
833 extern uschar *smtp_cmd_argument; /* For all SMTP commands */
834 extern uschar *smtp_cmd_buffer; /* SMTP command buffer */
835 extern struct timeval smtp_connection_start; /* Start time of SMTP connection */
836 extern uschar smtp_connection_had[]; /* Recent SMTP commands */
837 extern int smtp_connect_backlog; /* Max backlog permitted */
838 extern double smtp_delay_mail; /* Current MAIL delay */
839 extern double smtp_delay_rcpt; /* Current RCPT delay */
840 extern BOOL smtp_enforce_sync; /* Enforce sync rules */
841 extern uschar *smtp_etrn_command; /* Command to run */
842 extern BOOL smtp_etrn_serialize; /* Only one at once */
843 extern FILE *smtp_in; /* Incoming SMTP input file */
844 extern int smtp_load_reserve; /* Only from reserved if load > this */
845 extern int smtp_mailcmd_count; /* Count of MAIL commands */
846 extern int smtp_max_synprot_errors;/* Max syntax/protocol errors */
847 extern int smtp_max_unknown_commands; /* As it says */
848 extern uschar *smtp_notquit_reason; /* Global for disconnect reason */
849 extern FILE *smtp_out; /* Incoming SMTP output file */
850 extern uschar *smtp_ratelimit_hosts; /* Rate limit these hosts */
851 extern uschar *smtp_ratelimit_mail; /* Parameters for MAIL limiting */
852 extern uschar *smtp_ratelimit_rcpt; /* Parameters for RCPT limiting */
853 extern uschar *smtp_read_error; /* Message for SMTP input error */
854 extern int smtp_receive_timeout; /* Applies to each received line */
855 extern uschar *smtp_receive_timeout_s; /* ... expandable version */
856 extern uschar *smtp_reserve_hosts; /* Hosts for reserved slots */
857 extern BOOL smtp_return_error_details; /* TRUE to return full info */
858 extern int smtp_rlm_base; /* Base interval for MAIL rate limit */
859 extern double smtp_rlm_factor; /* Factor for MAIL rate limit */
860 extern int smtp_rlm_limit; /* Max delay */
861 extern int smtp_rlm_threshold; /* Threshold for RCPT rate limit */
862 extern int smtp_rlr_base; /* Base interval for RCPT rate limit */
863 extern double smtp_rlr_factor; /* Factor for RCPT rate limit */
864 extern int smtp_rlr_limit; /* Max delay */
865 extern int smtp_rlr_threshold; /* Threshold for RCPT rate limit */
866 extern unsigned smtp_peer_options; /* Global flags for passed connections */
867 extern unsigned smtp_peer_options_wrap; /* stacked version hidden by TLS */
869 extern uschar *smtputf8_advertise_hosts; /* ingress control */
872 #ifdef WITH_CONTENT_SCAN
873 extern uschar *spamd_address; /* address for the spamassassin daemon */
874 extern uschar *spam_bar; /* the spam "bar" (textual representation of spam_score) */
875 extern uschar *spam_report; /* the spamd report (multiline) */
876 extern uschar *spam_action; /* the spamd recommended-action */
877 extern uschar *spam_score; /* the spam score (float) */
878 extern uschar *spam_score_int; /* spam_score * 10 (int) */
881 extern uschar *spf_guess; /* spf best-guess record */
882 extern uschar *spf_header_comment; /* spf header comment */
883 extern uschar *spf_received; /* Received-SPF: header */
884 extern uschar *spf_result; /* spf result in string form */
885 extern BOOL spf_result_guessed; /* spf result is of best-guess operation */
886 extern uschar *spf_smtp_comment; /* spf comment to include in SMTP reply */
888 extern BOOL split_spool_directory; /* TRUE to use multiple subdirs */
889 extern uschar *spool_directory; /* Name of spool directory */
890 extern BOOL spool_file_wireformat; /* current -D file has CRLF rather than NL */
891 extern BOOL spool_wireformat; /* can write wireformat -D files */
892 #ifdef EXPERIMENTAL_SRS
893 extern uschar *srs_config; /* SRS config secret:max age:hash length:use timestamp:use hash */
894 extern uschar *srs_db_address; /* SRS db address */
895 extern uschar *srs_db_key; /* SRS db key */
896 extern int srs_hashlength; /* SRS hash length */
897 extern int srs_hashmin; /* SRS minimum hash length */
898 extern int srs_maxage; /* SRS max age */
899 extern uschar *srs_orig_sender; /* SRS original sender */
900 extern uschar *srs_orig_recipient; /* SRS original recipient */
901 extern uschar *srs_recipient; /* SRS recipient */
902 extern uschar *srs_secrets; /* SRS secrets list */
903 extern uschar *srs_status; /* SRS staus */
904 extern BOOL srs_usehash; /* SRS use hash flag */
905 extern BOOL srs_usetimestamp; /* SRS use timestamp flag */
907 extern BOOL strict_acl_vars; /* ACL variables have to be set before being used */
908 extern int string_datestamp_offset;/* After insertion by string_format */
909 extern int string_datestamp_length;/* After insertion by string_format */
910 extern int string_datestamp_type; /* After insertion by string_format */
911 extern BOOL strip_excess_angle_brackets; /* Surrounding route-addrs */
912 extern BOOL strip_trailing_dot; /* Remove dots at ends of domains */
913 extern uschar *submission_domain; /* Domain for submission mode */
914 extern BOOL submission_mode; /* Can be forced from ACL */
915 extern uschar *submission_name; /* User name set from ACL */
916 extern BOOL suppress_local_fixups; /* Can be forced from ACL */
917 extern BOOL suppress_local_fixups_default; /* former is reset to this; override with -G */
918 extern BOOL synchronous_delivery; /* TRUE if -odi is set */
919 extern BOOL syslog_duplication; /* FALSE => no duplicate logging */
920 extern int syslog_facility; /* As defined by Syslog.h */
921 extern BOOL syslog_pid; /* TRUE if PID on syslogs */
922 extern uschar *syslog_processname; /* 'ident' param to openlog() */
923 extern BOOL syslog_timestamp; /* TRUE if time on syslogs */
924 extern uschar *system_filter; /* Name of system filter file */
926 extern uschar *system_filter_directory_transport; /* Transports for the */
927 extern uschar *system_filter_file_transport; /* system filter */
928 extern uschar *system_filter_pipe_transport;
929 extern uschar *system_filter_reply_transport;
931 extern gid_t system_filter_gid; /* Gid for running system filter */
932 extern BOOL system_filter_gid_set; /* TRUE if gid set */
933 extern uid_t system_filter_uid; /* Uid for running system filter */
934 extern BOOL system_filter_uid_set; /* TRUE if uid set */
935 extern BOOL system_filtering; /* TRUE when running system filter */
937 extern BOOL tcp_fastopen_ok; /* appears to be supported by kernel */
938 extern blob tcp_fastopen_nodata; /* for zero-data TFO connect requests */
939 extern BOOL tcp_in_fastopen; /* conn usefully used fastopen */
940 extern BOOL tcp_in_fastopen_logged; /* one-time logging */
941 extern BOOL tcp_nodelay; /* Controls TCP_NODELAY on daemon */
942 extern int tcp_out_fastopen; /* 0: no 1: conn used 2: useful */
943 extern BOOL tcp_out_fastopen_logged; /* one-time logging */
944 #ifdef USE_TCP_WRAPPERS
945 extern uschar *tcp_wrappers_daemon_name; /* tcpwrappers daemon lookup name */
947 extern int test_harness_load_avg; /* For use when testing */
948 extern int thismessage_size_limit; /* Limit for this message */
949 extern int timeout_frozen_after; /* Max time to keep frozen messages */
950 extern BOOL timestamps_utc; /* Use UTC for all times */
952 extern uschar *transport_name; /* Name of transport last started */
953 extern int transport_count; /* Count of bytes transported */
954 extern int transport_newlines; /* Accurate count of number of newline chars transported */
955 extern const uschar **transport_filter_argv; /* For on-the-fly filtering */
956 extern int transport_filter_timeout; /* Timeout for same */
957 extern BOOL transport_filter_timed_out; /* True if it did */
959 extern transport_info transports_available[]; /* Vector of available transports */
960 extern transport_instance *transports; /* Chain of instantiated transports */
961 extern transport_instance transport_defaults; /* Default values */
963 extern int transport_write_timeout;/* Set to time out individual writes */
965 extern tree_node *tree_dns_fails; /* Tree of DNS lookup failures */
966 extern tree_node *tree_duplicates; /* Tree of duplicate addresses */
967 extern tree_node *tree_nonrecipients; /* Tree of nonrecipient addresses */
968 extern tree_node *tree_unusable; /* Tree of unusable addresses */
970 extern BOOL trusted_caller; /* Caller is trusted */
971 extern BOOL trusted_config; /* Configuration file is trusted */
972 extern gid_t *trusted_groups; /* List of trusted groups */
973 extern uid_t *trusted_users; /* List of trusted users */
974 extern uschar *timezone_string; /* Required timezone setting */
976 extern uschar *unknown_login; /* To use when login id unknown */
977 extern uschar *unknown_username; /* Ditto */
978 extern uschar *untrusted_set_sender; /* Let untrusted users set these senders */
979 extern uschar *uucp_from_pattern; /* For recognizing "From " lines */
980 extern uschar *uucp_from_sender; /* For building the sender */
982 extern uschar *warn_message_file; /* Template for warning messages */
983 extern uschar *warnmsg_delay; /* String form of delay time */
984 extern uschar *warnmsg_recipients; /* Recipients of warning message */
985 extern BOOL write_rejectlog; /* Control of reject logging */
987 extern uschar *verify_mode; /* Running a router in verify mode */
988 extern uschar *version_copyright; /* Copyright notice */
989 extern uschar *version_date; /* Date of compilation */
990 extern uschar *version_cnumber; /* Compile number */
991 extern uschar *version_string; /* Version string */
993 extern int warning_count; /* Delay warnings sent for this msg */
995 /* End of globals.h */
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