1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4 /* Experimental DMARC support.
5 Copyright (c) Todd Lyons <tlyons@exim.org> 2012, 2013
8 /* Portions Copyright (c) 2012, 2013, The Trusted Domain Project;
9 All rights reserved, licensed for use per LICENSE.opendmarc. */
11 /* Code for calling dmarc checks via libopendmarc. Called from acl.c. */
14 #ifdef EXPERIMENTAL_DMARC
16 #include "functions.h"
18 #include "pdkim/pdkim.h"
20 OPENDMARC_LIB_T dmarc_ctx
;
21 DMARC_POLICY_T
*dmarc_pctx
= NULL
;
22 OPENDMARC_STATUS_T libdm_status
, action
, dmarc_policy
;
23 OPENDMARC_STATUS_T da
, sa
, action
;
24 BOOL dmarc_abort
= FALSE
;
25 uschar
*dmarc_pass_fail
= US
"skipped";
26 extern pdkim_signature
*dkim_signatures
;
27 header_line
*from_header
= NULL
;
28 #ifdef EXPERIMENTAL_SPF
29 extern SPF_response_t
*spf_response
;
30 int dmarc_spf_result
= 0;
31 uschar
*spf_sender_domain
= NULL
;
32 uschar
*spf_human_readable
= NULL
;
34 u_char
*header_from_sender
= NULL
;
35 int history_file_status
= DMARC_HIST_OK
;
36 uschar
*history_buffer
= NULL
;
37 uschar
*dkim_history_buffer
= NULL
;
39 /* Accept an error_block struct, initialize if empty, parse to the
40 * end, and append the two strings passed to it. Used for adding
41 * variable amounts of value:pair data to the forensic emails. */
44 add_to_eblock(error_block
*eblock
, uschar
*t1
, uschar
*t2
)
46 error_block
*eb
= malloc(sizeof(error_block
));
51 /* Find the end of the eblock struct and point it at eb */
52 error_block
*tmp
= eblock
;
53 while(tmp
->next
!= NULL
)
63 /* dmarc_init sets up a context that can be re-used for several
64 messages on the same SMTP connection (that come from the
65 same host with the same HELO string) */
68 int *netmask
= NULL
; /* Ignored */
70 char *tld_file
= (dmarc_tld_file
== NULL
) ?
71 "/etc/exim/opendmarc.tlds" :
72 (char *)dmarc_tld_file
;
74 /* Set some sane defaults. Also clears previous results when
75 * multiple messages in one connection. */
77 dmarc_status
= US
"none";
79 dmarc_pass_fail
= US
"skipped";
80 dmarc_used_domain
= US
"";
81 header_from_sender
= NULL
;
82 #ifdef EXPERIMENTAL_SPF
83 spf_sender_domain
= NULL
;
84 spf_human_readable
= NULL
;
87 /* ACLs have "control=dmarc_disable_verify" */
88 if (dmarc_disable_verify
== TRUE
)
91 (void) memset(&dmarc_ctx
, '\0', sizeof dmarc_ctx
);
92 dmarc_ctx
.nscount
= 0;
93 libdm_status
= opendmarc_policy_library_init(&dmarc_ctx
);
94 if (libdm_status
!= DMARC_PARSE_OKAY
)
96 log_write(0, LOG_MAIN
|LOG_PANIC
, "DMARC failure to init library: %s",
97 opendmarc_policy_status_to_str(libdm_status
));
100 if (opendmarc_tld_read_file(tld_file
, NULL
, NULL
, NULL
))
102 log_write(0, LOG_MAIN
|LOG_PANIC
, "DMARC failure to load tld list %s: %d",
106 if (sender_host_address
== NULL
)
108 /* This catches locally originated email and startup errors above. */
109 if ( dmarc_abort
== FALSE
)
111 is_ipv6
= string_is_ip_address(sender_host_address
, netmask
);
112 is_ipv6
= (is_ipv6
== 6) ? TRUE
:
113 (is_ipv6
== 4) ? FALSE
: FALSE
;
114 dmarc_pctx
= opendmarc_policy_connect_init(sender_host_address
, is_ipv6
);
115 if (dmarc_pctx
== NULL
)
117 log_write(0, LOG_MAIN
|LOG_PANIC
, "DMARC failure creating policy context: ip=%s",
118 sender_host_address
);
127 /* dmarc_store_data stores the header data so that subsequent
128 * dmarc_process can access the data */
130 int dmarc_store_data(header_line
*hdr
) {
131 /* No debug output because would change every test debug output */
132 if (dmarc_disable_verify
!= TRUE
)
138 /* dmarc_process adds the envelope sender address to the existing
139 context (if any), retrieves the result, sets up expansion
140 strings and evaluates the condition outcome. */
142 int dmarc_process() {
143 int sr
, origin
; /* used in SPF section */
144 pdkim_signature
*sig
= NULL
;
145 BOOL has_dmarc_record
= TRUE
;
146 u_char
**ruf
; /* forensic report addressees, if called for */
148 /* ACLs have "control=dmarc_disable_verify" */
149 if (dmarc_disable_verify
== TRUE
)
151 dmarc_ar_header
= dmarc_auth_results_header(from_header
, NULL
);
155 /* Store the header From: sender domain for this part of DMARC.
156 * If there is no from_header struct, then it's likely this message
157 * is locally generated and relying on fixups to add it. Just skip
158 * the entire DMARC system if we can't find a From: header....or if
159 * there was a previous error.
161 if (from_header
== NULL
|| dmarc_abort
== TRUE
)
165 /* I strongly encourage anybody who can make this better to contact me directly!
166 * <cannonball> Is this an insane way to extract the email address from the From: header?
167 * <jgh_hm> it's sure a horrid layer-crossing....
168 * <cannonball> I'm not denying that :-/
169 * <jgh_hm> there may well be no better though
171 header_from_sender
= expand_string(
172 string_sprintf("${domain:${extract{1}{:}{${addresses:%s}}}}",
173 from_header
->text
) );
174 /* The opendmarc library extracts the domain from the email address, but
175 * only try to store it if it's not empty. Otherwise, skip out of DMARC. */
176 if (strcmp( CCS header_from_sender
, "") == 0)
178 libdm_status
= (dmarc_abort
== TRUE
) ?
180 opendmarc_policy_store_from_domain(dmarc_pctx
, header_from_sender
);
181 if (libdm_status
!= DMARC_PARSE_OKAY
)
183 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to store header From: in DMARC: %s, header was '%s'",
184 opendmarc_policy_status_to_str(libdm_status
), from_header
->text
);
189 /* Skip DMARC if connection is SMTP Auth. Temporarily, admin should
190 * instead do this in the ACLs. */
191 if (dmarc_abort
== FALSE
&& sender_host_authenticated
== NULL
)
193 #ifdef EXPERIMENTAL_SPF
194 /* Use the envelope sender domain for this part of DMARC */
195 spf_sender_domain
= expand_string(US
"$sender_address_domain");
196 if ( spf_response
== NULL
)
198 /* No spf data means null envelope sender so generate a domain name
199 * from the sender_host_name || sender_helo_name */
200 if (spf_sender_domain
== NULL
)
202 spf_sender_domain
= (sender_host_name
== NULL
) ? sender_helo_name
: sender_host_name
;
203 uschar
*subdomain
= spf_sender_domain
;
205 while (subdomain
&& *subdomain
!= '.')
210 /* If parsed characters in temp var "subdomain" and is pointing to
211 * a period now, get rid of the period and use that. Otherwise
212 * will use whatever was first set in spf_sender_domain. Goal is to
213 * generate a sane answer, not necessarily the right/best answer b/c
214 * at this point with a null sender, it's a bounce message, making
215 * the spf domain be subjective. */
216 if (count
> 0 && *subdomain
== '.')
219 spf_sender_domain
= subdomain
;
221 log_write(0, LOG_MAIN
, "DMARC using synthesized SPF sender domain = %s\n",
224 debug_printf("DMARC using synthesized SPF sender domain = %s\n", spf_sender_domain
);
226 dmarc_spf_result
= DMARC_POLICY_SPF_OUTCOME_NONE
;
227 origin
= DMARC_POLICY_SPF_ORIGIN_HELO
;
228 spf_human_readable
= US
"";
232 sr
= spf_response
->result
;
233 dmarc_spf_result
= (sr
== SPF_RESULT_NEUTRAL
) ? DMARC_POLICY_SPF_OUTCOME_NONE
:
234 (sr
== SPF_RESULT_PASS
) ? DMARC_POLICY_SPF_OUTCOME_PASS
:
235 (sr
== SPF_RESULT_FAIL
) ? DMARC_POLICY_SPF_OUTCOME_FAIL
:
236 (sr
== SPF_RESULT_SOFTFAIL
) ? DMARC_POLICY_SPF_OUTCOME_TMPFAIL
:
237 DMARC_POLICY_SPF_OUTCOME_NONE
;
238 origin
= DMARC_POLICY_SPF_ORIGIN_MAILFROM
;
239 spf_human_readable
= (uschar
*)spf_response
->header_comment
;
241 debug_printf("DMARC using SPF sender domain = %s\n", spf_sender_domain
);
243 if (strcmp( CCS spf_sender_domain
, "") == 0)
245 if (dmarc_abort
== FALSE
)
247 libdm_status
= opendmarc_policy_store_spf(dmarc_pctx
, spf_sender_domain
,
248 dmarc_spf_result
, origin
, spf_human_readable
);
249 if (libdm_status
!= DMARC_PARSE_OKAY
)
250 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to store spf for DMARC: %s",
251 opendmarc_policy_status_to_str(libdm_status
));
253 #endif /* EXPERIMENTAL_SPF */
255 /* Now we cycle through the dkim signature results and put into
256 * the opendmarc context, further building the DMARC reply. */
257 sig
= dkim_signatures
;
258 dkim_history_buffer
= US
"";
262 vs
= sig
->verify_status
;
263 dkim_result
= ( vs
== PDKIM_VERIFY_PASS
) ? DMARC_POLICY_DKIM_OUTCOME_PASS
:
264 ( vs
== PDKIM_VERIFY_FAIL
) ? DMARC_POLICY_DKIM_OUTCOME_FAIL
:
265 ( vs
== PDKIM_VERIFY_INVALID
) ? DMARC_POLICY_DKIM_OUTCOME_TMPFAIL
:
266 DMARC_POLICY_DKIM_OUTCOME_NONE
;
267 libdm_status
= opendmarc_policy_store_dkim(dmarc_pctx
, (uschar
*)sig
->domain
,
270 debug_printf("DMARC adding DKIM sender domain = %s\n", sig
->domain
);
271 if (libdm_status
!= DMARC_PARSE_OKAY
)
272 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to store dkim (%s) for DMARC: %s",
273 sig
->domain
, opendmarc_policy_status_to_str(libdm_status
));
275 dkim_history_buffer
= string_sprintf("%sdkim %s %d\n", dkim_history_buffer
,
276 sig
->domain
, dkim_result
);
279 libdm_status
= opendmarc_policy_query_dmarc(dmarc_pctx
, US
"");
280 switch (libdm_status
)
282 case DMARC_DNS_ERROR_NXDOMAIN
:
283 case DMARC_DNS_ERROR_NO_RECORD
:
285 debug_printf("DMARC no record found for %s\n", header_from_sender
);
286 has_dmarc_record
= FALSE
;
288 case DMARC_PARSE_OKAY
:
290 debug_printf("DMARC record found for %s\n", header_from_sender
);
292 case DMARC_PARSE_ERROR_BAD_VALUE
:
294 debug_printf("DMARC record parse error for %s\n", header_from_sender
);
295 has_dmarc_record
= FALSE
;
298 /* everything else, skip dmarc */
300 debug_printf("DMARC skipping (%d), unsure what to do with %s",
301 libdm_status
, from_header
->text
);
302 has_dmarc_record
= FALSE
;
305 /* Can't use exim's string manipulation functions so allocate memory
306 * for libopendmarc using its max hostname length definition. */
307 uschar
*dmarc_domain
= (uschar
*)calloc(DMARC_MAXHOSTNAMELEN
, sizeof(uschar
));
308 libdm_status
= opendmarc_policy_fetch_utilized_domain(dmarc_pctx
, dmarc_domain
,
309 DMARC_MAXHOSTNAMELEN
-1);
310 dmarc_used_domain
= string_copy(dmarc_domain
);
312 if (libdm_status
!= DMARC_PARSE_OKAY
)
314 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to read domainname used for DMARC lookup: %s",
315 opendmarc_policy_status_to_str(libdm_status
));
317 libdm_status
= opendmarc_get_policy_to_enforce(dmarc_pctx
);
318 dmarc_policy
= libdm_status
;
321 case DMARC_POLICY_ABSENT
: /* No DMARC record found */
322 dmarc_status
= US
"norecord";
323 dmarc_pass_fail
= US
"temperror";
324 dmarc_status_text
= US
"No DMARC record";
325 action
= DMARC_RESULT_ACCEPT
;
327 case DMARC_FROM_DOMAIN_ABSENT
: /* No From: domain */
328 dmarc_status
= US
"nofrom";
329 dmarc_pass_fail
= US
"temperror";
330 dmarc_status_text
= US
"No From: domain found";
331 action
= DMARC_RESULT_ACCEPT
;
333 case DMARC_POLICY_NONE
: /* Accept and report */
334 dmarc_status
= US
"none";
335 dmarc_pass_fail
= US
"none";
336 dmarc_status_text
= US
"None, Accept";
337 action
= DMARC_RESULT_ACCEPT
;
339 case DMARC_POLICY_PASS
: /* Explicit accept */
340 dmarc_status
= US
"accept";
341 dmarc_pass_fail
= US
"pass";
342 dmarc_status_text
= US
"Accept";
343 action
= DMARC_RESULT_ACCEPT
;
345 case DMARC_POLICY_REJECT
: /* Explicit reject */
346 dmarc_status
= US
"reject";
347 dmarc_pass_fail
= US
"fail";
348 dmarc_status_text
= US
"Reject";
349 action
= DMARC_RESULT_REJECT
;
351 case DMARC_POLICY_QUARANTINE
: /* Explicit quarantine */
352 dmarc_status
= US
"quarantine";
353 dmarc_pass_fail
= US
"fail";
354 dmarc_status_text
= US
"Quarantine";
355 action
= DMARC_RESULT_QUARANTINE
;
358 dmarc_status
= US
"temperror";
359 dmarc_pass_fail
= US
"temperror";
360 dmarc_status_text
= US
"Internal Policy Error";
361 action
= DMARC_RESULT_TEMPFAIL
;
365 libdm_status
= opendmarc_policy_fetch_alignment(dmarc_pctx
, &da
, &sa
);
366 if (libdm_status
!= DMARC_PARSE_OKAY
)
368 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to read DMARC alignment: %s",
369 opendmarc_policy_status_to_str(libdm_status
));
372 if (has_dmarc_record
== TRUE
)
374 log_write(0, LOG_MAIN
, "DMARC results: spf_domain=%s dmarc_domain=%s "
375 "spf_align=%s dkim_align=%s enforcement='%s'",
376 spf_sender_domain
, dmarc_used_domain
,
377 (sa
==DMARC_POLICY_SPF_ALIGNMENT_PASS
) ?"yes":"no",
378 (da
==DMARC_POLICY_DKIM_ALIGNMENT_PASS
)?"yes":"no",
380 history_file_status
= dmarc_write_history_file();
381 /* Now get the forensic reporting addresses, if any */
382 ruf
= opendmarc_policy_fetch_ruf(dmarc_pctx
, NULL
, 0, 1);
383 dmarc_send_forensic_report(ruf
);
387 /* set some global variables here */
388 dmarc_ar_header
= dmarc_auth_results_header(from_header
, NULL
);
390 /* shut down libopendmarc */
391 if ( dmarc_pctx
!= NULL
)
392 (void) opendmarc_policy_connect_shutdown(dmarc_pctx
);
393 if ( dmarc_disable_verify
== FALSE
)
394 (void) opendmarc_policy_library_shutdown(&dmarc_ctx
);
399 int dmarc_write_history_file()
401 static int history_file_fd
;
404 u_char
**rua
; /* aggregate report addressees */
406 if (dmarc_history_file
== NULL
)
407 return DMARC_HIST_DISABLED
;
408 history_file_fd
= log_create(dmarc_history_file
);
410 if (history_file_fd
< 0)
412 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to create DMARC history file: %s",
414 return DMARC_HIST_FILE_ERR
;
417 /* Generate the contents of the history file */
418 history_buffer
= string_sprintf("job %s\n", message_id
);
419 history_buffer
= string_sprintf("%sreporter %s\n", history_buffer
, primary_hostname
);
420 history_buffer
= string_sprintf("%sreceived %ld\n", history_buffer
, time(NULL
));
421 history_buffer
= string_sprintf("%sipaddr %s\n", history_buffer
, sender_host_address
);
422 history_buffer
= string_sprintf("%sfrom %s\n", history_buffer
, header_from_sender
);
423 history_buffer
= string_sprintf("%smfrom %s\n", history_buffer
,
424 expand_string(US
"$sender_address_domain"));
426 #ifdef EXPERIMENTAL_SPF
427 if (spf_response
!= NULL
)
428 history_buffer
= string_sprintf("%sspf %d\n", history_buffer
, dmarc_spf_result
);
430 history_buffer
= string_sprintf("%sspf -1\n", history_buffer
);
431 #endif /* EXPERIMENTAL_SPF */
433 history_buffer
= string_sprintf("%s%s", history_buffer
, dkim_history_buffer
);
434 history_buffer
= string_sprintf("%spdomain %s\n", history_buffer
, dmarc_used_domain
);
435 history_buffer
= string_sprintf("%spolicy %d\n", history_buffer
, dmarc_policy
);
437 rua
= opendmarc_policy_fetch_rua(dmarc_pctx
, NULL
, 0, 1);
440 for (tmp_ans
= 0; rua
[tmp_ans
] != NULL
; tmp_ans
++)
442 history_buffer
= string_sprintf("%srua %s\n", history_buffer
, rua
[tmp_ans
]);
446 history_buffer
= string_sprintf("%srua -\n", history_buffer
);
448 opendmarc_policy_fetch_pct(dmarc_pctx
, &tmp_ans
);
449 history_buffer
= string_sprintf("%spct %d\n", history_buffer
, tmp_ans
);
451 opendmarc_policy_fetch_adkim(dmarc_pctx
, &tmp_ans
);
452 history_buffer
= string_sprintf("%sadkim %d\n", history_buffer
, tmp_ans
);
454 opendmarc_policy_fetch_aspf(dmarc_pctx
, &tmp_ans
);
455 history_buffer
= string_sprintf("%saspf %d\n", history_buffer
, tmp_ans
);
457 opendmarc_policy_fetch_p(dmarc_pctx
, &tmp_ans
);
458 history_buffer
= string_sprintf("%sp %d\n", history_buffer
, tmp_ans
);
460 opendmarc_policy_fetch_sp(dmarc_pctx
, &tmp_ans
);
461 history_buffer
= string_sprintf("%ssp %d\n", history_buffer
, tmp_ans
);
463 history_buffer
= string_sprintf("%salign_dkim %d\n", history_buffer
, da
);
464 history_buffer
= string_sprintf("%salign_spf %d\n", history_buffer
, sa
);
465 history_buffer
= string_sprintf("%saction %d\n", history_buffer
, action
);
467 /* Write the contents to the history file */
469 debug_printf("DMARC logging history data for opendmarc reporting%s\n",
470 (host_checking
|| running_in_test_harness
) ? " (not really)" : "");
471 if (host_checking
|| running_in_test_harness
)
474 debug_printf("DMARC history data for debugging:\n%s", history_buffer
);
478 written_len
= write_to_fd_buf(history_file_fd
,
480 Ustrlen(history_buffer
));
481 if (written_len
== 0)
483 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to write to DMARC history file: %s",
485 return DMARC_HIST_WRITE_ERR
;
487 (void)close(history_file_fd
);
489 return DMARC_HIST_OK
;
492 void dmarc_send_forensic_report(u_char
**ruf
)
495 uschar
*recipient
, *save_sender
;
496 BOOL send_status
= FALSE
;
497 error_block
*eblock
= NULL
;
498 FILE *message_file
= NULL
;
500 /* Earlier ACL does not have *required* control=dmarc_enable_forensic */
501 if (dmarc_enable_forensic
== FALSE
)
504 if ((dmarc_policy
== DMARC_POLICY_REJECT
&& action
== DMARC_RESULT_REJECT
) ||
505 (dmarc_policy
== DMARC_POLICY_QUARANTINE
&& action
== DMARC_RESULT_QUARANTINE
) )
509 eblock
= add_to_eblock(eblock
, US
"Sender Domain", dmarc_used_domain
);
510 eblock
= add_to_eblock(eblock
, US
"Sender IP Address", sender_host_address
);
511 eblock
= add_to_eblock(eblock
, US
"Received Date", tod_stamp(tod_full
));
512 eblock
= add_to_eblock(eblock
, US
"SPF Alignment",
513 (sa
==DMARC_POLICY_SPF_ALIGNMENT_PASS
) ?US
"yes":US
"no");
514 eblock
= add_to_eblock(eblock
, US
"DKIM Alignment",
515 (da
==DMARC_POLICY_DKIM_ALIGNMENT_PASS
)?US
"yes":US
"no");
516 eblock
= add_to_eblock(eblock
, US
"DMARC Results", dmarc_status_text
);
517 /* Set a sane default envelope sender */
518 dsn_from
= dmarc_forensic_sender
? dmarc_forensic_sender
:
519 dsn_from
? dsn_from
:
520 string_sprintf("do-not-reply@%s",primary_hostname
);
521 for (c
= 0; ruf
[c
] != NULL
; c
++)
523 recipient
= string_copylc(ruf
[c
]);
524 if (Ustrncmp(recipient
, "mailto:",7))
526 /* Move to first character past the colon */
529 debug_printf("DMARC forensic report to %s%s\n", recipient
,
530 (host_checking
|| running_in_test_harness
) ? " (not really)" : "");
531 if (host_checking
|| running_in_test_harness
)
533 save_sender
= sender_address
;
534 sender_address
= recipient
;
535 send_status
= moan_to_sender(ERRMESS_DMARC_FORENSIC
, eblock
,
536 header_list
, message_file
, FALSE
);
537 sender_address
= save_sender
;
538 if (send_status
== FALSE
)
539 log_write(0, LOG_MAIN
|LOG_PANIC
, "failure to send DMARC forensic report to %s",
546 uschar
*dmarc_exim_expand_query(int what
)
548 if (dmarc_disable_verify
|| !dmarc_pctx
)
549 return dmarc_exim_expand_defaults(what
);
552 case DMARC_VERIFY_STATUS
:
553 return(dmarc_status
);
559 uschar
*dmarc_exim_expand_defaults(int what
)
562 case DMARC_VERIFY_STATUS
:
563 return (dmarc_disable_verify
) ?
571 uschar
*dmarc_auth_results_header(header_line
*from_header
, uschar
*hostname
)
573 uschar
*hdr_tmp
= US
"";
575 /* Allow a server hostname to be passed to this function, but is
576 * currently unused */
577 if (hostname
== NULL
)
578 hostname
= primary_hostname
;
579 hdr_tmp
= string_sprintf("%s %s;", DMARC_AR_HEADER
, hostname
);
582 /* I don't think this belongs here, but left it here commented out
583 * because it was a lot of work to get working right. */
584 #ifdef EXPERIMENTAL_SPF
585 if (spf_response
!= NULL
) {
586 uschar
*dmarc_ar_spf
= US
"";
588 sr
= spf_response
->result
;
589 dmarc_ar_spf
= (sr
== SPF_RESULT_NEUTRAL
) ? US
"neutral" :
590 (sr
== SPF_RESULT_PASS
) ? US
"pass" :
591 (sr
== SPF_RESULT_FAIL
) ? US
"fail" :
592 (sr
== SPF_RESULT_SOFTFAIL
) ? US
"softfail" :
594 hdr_tmp
= string_sprintf("%s spf=%s (%s) smtp.mail=%s;",
595 hdr_tmp
, dmarc_ar_spf_result
,
596 spf_response
->header_comment
,
597 expand_string(US
"$sender_address") );
601 hdr_tmp
= string_sprintf("%s dmarc=%s",
602 hdr_tmp
, dmarc_pass_fail
);
603 if (header_from_sender
)
604 hdr_tmp
= string_sprintf("%s header.from=%s",
605 hdr_tmp
, header_from_sender
);
611 // vim:sw=2 expandtab