1PROCMAILRC(5) File Formats Manual PROCMAILRC(5)
2
6 procmailrc - procmail rcfile
7
9 $HOME/.procmailrc
10
12 For a quick start, see NOTES at the end of the procmail(1) man page.
13 The rcfile can contain a mixture of environment variable assignments
15 (some of which have special meanings to procmail), and recipes. In
16 their most simple appearance, the recipes are simply one line regular
17 expressions that are searched for in the header of the arriving mail.
18 The first recipe that matches is used to determine where the mail has
19 to go (usually a file). If processing falls off the end of the rcfile,
20 procmail will deliver the mail to $DEFAULT.
21 There are two kinds of recipes: delivering and non-delivering recipes.
23 If a delivering recipe is found to match, procmail considers the mail
24 (you guessed it) delivered and will cease processing the rcfile after
25 having successfully executed the action line of the recipe. If a non-
26 delivering recipe is found to match, processing of the rcfile will con‐
27 tinue after the action line of this recipe has been executed.
28 Delivering recipes are those that cause header and/or body of the mail
30 to be: written into a file, absorbed by a program or forwarded to a
31 mailaddress.
32 Non-delivering recipes are: those that cause the output of a program or
34 filter to be captured back by procmail or those that start a nesting
35 block.
36 You can tell procmail to treat a delivering recipe as if it were a non-
38 delivering recipe by specifying the `c' flag on such a recipe. This
39 will make procmail generate a carbon copy of the mail by delivering it
40 to this recipe, yet continue processing the rcfile.
41 By using any number of recipes you can presort your mail extremely
43 straightforward into several mailfolders. Bear in mind though that the
44 mail can arrive concurrently in these mailfolders (if several procmail
45 programs happen to run at the same time, not unlikely if a lot of mail
46 arrives). To make sure this does not result in a mess, proper use of
47 lockfiles is highly recommended.
48 The environment variable assignments and recipes can be freely inter‐
50 mixed in the rcfile. If any environment variable has a special meaning
51 to procmail, it will be used appropriately the moment it is parsed
52 (i.e., you can change the current directory whenever you want by speci‐
53 fying a new MAILDIR, switch lockfiles by specifying a new LOCKFILE,
54 change the umask at any time, etc., the possibilities are endless :-).
55 The assignments and substitutions of these environment variables are
57 handled exactly like in sh(1) (that includes all possible quotes and
58 escapes), with the added bonus that blanks around the '=' sign are
59 ignored and that, if an environment variable appears without a trailing
60 '=', it will be removed from the environment. Any program in back‐
61 quotes started by procmail will have the entire mail at its stdin.
62 Comments
64 A word beginning with # and all the following characters up to a NEW‐
65 LINE are ignored. This does not apply to condition lines, which cannot
66 be commented.
67 Recipes
69 A line starting with ':' marks the beginning of a recipe. It has the
70 following format:
71 :0 [flags] [ : [locallockfile] ]
73 <zero or more conditions (one per line)>
74 <exactly one action line>
75 Conditions start with a leading `*', everything after that character is
77 passed on to the internal egrep literally, except for leading and
78 trailing whitespace. These regular expressions are completely compati‐
79 ble to the normal egrep(1) extended regular expressions. See also
80 Extended regular expressions.
81 Conditions are anded; if there are no conditions the result will be
83 true by default.
84 Flags can be any of the following:
86 H Egrep the header (default).
88 B Egrep the body.
90 D Tell the internal egrep to distinguish between upper and lower
92 case (contrary to the default which is to ignore case).
93 A This recipe will not be executed unless the conditions on the last
95 preceding recipe (on the current block-nesting level) without the
96 `A' or `a' flag matched as well. This allows you to chain actions
97 that depend on a common condition.
98 a Has the same meaning as the `A' flag, with the additional condi‐
100 tion that the immediately preceding recipe must have been success‐
101 fully completed before this recipe is executed.
102 E This recipe only executes if the immediately preceding recipe was
104 not executed. Execution of this recipe also disables any immedi‐
105 ately following recipes with the 'E' flag. This allows you to
106 specify `else if' actions.
107 e This recipe only executes if the immediately preceding recipe
109 failed (i.e., the action line was attempted, but resulted in an
110 error).
111 h Feed the header to the pipe, file or mail destination (default).
113 b Feed the body to the pipe, file or mail destination (default).
115 f Consider the pipe as a filter.
117 c Generate a carbon copy of this mail. This only makes sense on
119 delivering recipes. The only non-delivering recipe this flag has
120 an effect on is on a nesting block, in order to generate a carbon
121 copy this will clone the running procmail process (lockfiles will
122 not be inherited), whereby the clone will proceed as usual and the
123 parent will jump across the block.
124 w Wait for the filter or program to finish and check its exitcode
126 (normally ignored); if the filter is unsuccessful, then the text
127 will not have been filtered.
128 W Has the same meaning as the `w' flag, but will suppress any `Pro‐
130 gram failure' message.
131 i Ignore any write errors on this recipe (i.e., usually due to an
133 early closed pipe).
134 r Raw mode, do not try to ensure the mail ends with an empty line,
136 write it out as is.
137 There are some special conditions you can use that are not straight
139 regular expressions. To select them, the condition must start with:
140 ! Invert the condition.
142 $ Evaluate the remainder of this condition according to sh(1) sub‐
144 stitution rules inside double quotes, skip leading whitespace,
145 then reparse it.
146 ? Use the exitcode of the specified program.
148 < Check if the total length of the mail is shorter than the speci‐
150 fied (in decimal) number of bytes.
151 > Analogous to '<'.
153 variablename ??
155 Match the remainder of this condition against the value of this
156 environment variable (which cannot be a pseudo variable). A spe‐
157 cial case is if variablename is equal to `B', `H', `HB' or `BH';
158 this merely overrides the default header/body search area defined
159 by the initial flags on this recipe.
160 \ To quote any of the above at the start of the line.
162 Local lockfile
164 If you put a second (trailing) ':' on the first recipe line, then proc‐
165 mail will use a locallockfile (for this recipe only). You can option‐
166 ally specify the locallockfile to use; if you don't however, procmail
167 will use the destination filename (or the filename following the first
168 '>>') and will append $LOCKEXT to it.
169 Recipe action line
171 The action line can start with the following characters:
172 ! Forwards to all the specified mail addresses.
174 | Starts the specified program, possibly in $SHELL if any of the
176 characters $SHELLMETAS are spotted. You can optionally prepend
177 this pipe symbol with variable=, which will cause stdout of the
178 program to be captured in the environment variable (procmail
179 will not terminate processing the rcfile at this point). If you
180 specify just this pipe symbol, without any program, then proc‐
181 mail will pipe the mail to stdout.
182 { Followed by at least one space, tab or newline will mark the
184 start of a nesting block. Everything up till the next closing
185 brace will depend on the conditions specified for this recipe.
186 Unlimited nesting is permitted. The closing brace exists merely
187 to delimit the block, it will not cause procmail to terminate in
188 any way. If the end of a block is reached processing will con‐
189 tinue as usual after the block. On a nesting block, the flags
190 `H' and `B' only affect the conditions leading up to the block,
191 the flags `h' and `b' have no effect whatsoever.
192 Anything else will be taken as a mailbox name (either a filename or a
194 directory, absolute or relative to the current directory (see
195 MAILDIR)). If it is a (possibly yet nonexistent) filename, the mail
196 will be appended to it.
197 If it is a directory, the mail will be delivered to a newly created,
199 guaranteed to be unique file named $MSGPREFIX* in the specified direc‐
200 tory. If the mailbox name ends in "/.", then this directory is pre‐
201 sumed to be an MH folder; i.e., procmail will use the next number it
202 finds available. If the mailbox name ends in "/", then this directory
203 is presumed to be a maildir folder; i.e., procmail will deliver the
204 message to a file in a subdirectory named "tmp" and rename it to be
205 inside a subdirectory named "new". If the mailbox is specified to be
206 an MH folder or maildir folder, procmail will create the necessary
207 directories if they don't exist, rather than treat the mailbox as a
208 non-existent filename. When procmail is delivering to directories, you
209 can specify multiple directories to deliver to (procmail will do so
210 utilising hardlinks).
211 Environment variable defaults
213 LOGNAME, HOME and SHELL
214 Your (the recipient's) defaults
215 PATH $HOME/bin:/bin:/usr/bin:/sbin:/usr/sbin
217 :/usr/local/bin:/usr/X11R6/bin (Except during the
218 processing of an /etc/procmailrc file, when it
219 will be set to `/bin:/usr/bin'.)
220 SHELLMETAS &|<>~;?*[
222 SHELLFLAGS -c
224 ORGMAIL /var/spool/mail/$LOGNAME
226 (Unless -m has been specified, in which case it
227 is unset)
228 MAILDIR $HOME
230 (Unless the name of the first successfully opened
231 rcfile starts with `./' or if -m has been speci‐
232 fied, in which case it defaults to `.')
233 DEFAULT $ORGMAIL
235 MSGPREFIX msg.
237 SENDMAIL /usr/sbin/sendmail
239 SENDMAILFLAGS -oi
241 HOST The current hostname
243 COMSAT no
245 (If an rcfile is specified on the command line)
246 PROCMAIL_VERSION 3.22
248 LOCKEXT .lock
250 Other cleared or preset environment variables are IFS, ENV and PWD.
252 For security reasons, upon startup procmail will wipe out all environ‐
254 ment variables that are suspected of modifying the behavior of the run‐
255 time linker.
256 Environment
258 Before you get lost in the multitude of environment variables, keep in
259 mind that all of them have reasonable defaults.
260 MAILDIR Current directory while procmail is executing (that means
262 that all paths are relative to $MAILDIR).
263 DEFAULT Default mailbox file (if not told otherwise, procmail will
265 dump mail in this mailbox). Procmail will automatically
266 use $DEFAULT$LOCKEXT as lockfile prior to writing to this
267 mailbox. You do not need to set this variable, since it
268 already points to the standard system mailbox.
269 LOGFILE This file will also contain any error or diagnostic mes‐
271 sages from procmail (normally none :-) or any other pro‐
272 grams started by procmail. If this file is not specified,
273 any diagnostics or error messages will be mailed back to
274 the sender. See also LOGABSTRACT.
275 VERBOSE You can turn on extended diagnostics by setting this vari‐
277 able to `yes' or `on', to turn it off again set it to `no'
278 or `off'.
279 LOGABSTRACT Just before procmail exits it logs an abstract of the
281 delivered message in $LOGFILE showing the `From ' and `Sub‐
282 ject:' fields of the header, what folder it finally went to
283 and how long (in bytes) the message was. By setting this
284 variable to `no', generation of this abstract is sup‐
285 pressed. If you set it to `all', procmail will log an
286 abstract for every successful delivering recipe it pro‐
287 cesses.
288 LOG Anything assigned to this variable will be appended to
290 $LOGFILE.
291 ORGMAIL Usually the system mailbox (ORiGinal MAILbox). If, for
293 some obscure reason (like `filesystem full') the mail could
294 not be delivered, then this mailbox will be the last
295 resort. If procmail fails to save the mail in here (deep,
296 deep trouble :-), then the mail will bounce back to the
297 sender.
298 LOCKFILE Global semaphore file. If this file already exists, proc‐
300 mail will wait until it has gone before proceeding, and
301 will create it itself (cleaning it up when ready, of
302 course). If more than one lockfile are specified, then the
303 previous one will be removed before trying to create the
304 new one. The use of a global lockfile is discouraged,
305 whenever possible use locallockfiles (on a per recipe
306 basis) instead.
307 LOCKEXT Default extension that is appended to a destination file to
309 determine what local lockfile to use (only if turned on, on
310 a per-recipe basis).
311 LOCKSLEEP Number of seconds procmail will sleep before retrying on a
313 lockfile (if it already existed); if not specified, it
314 defaults to 8 seconds.
315 LOCKTIMEOUT Number of seconds that have to have passed since a lockfile
317 was last modified/created before procmail decides that this
318 must be an erroneously leftover lockfile that can be
319 removed by force now. If zero, then no timeout will be
320 used and procmail will wait forever until the lockfile is
321 removed; if not specified, it defaults to 1024 seconds.
322 This variable is useful to prevent indefinite hangups of
323 sendmail/procmail. Procmail is immune to clock skew across
324 machines.
325 TIMEOUT Number of seconds that have to have passed before procmail
327 decides that some child it started must be hanging. The
328 offending program will receive a TERMINATE signal from
329 procmail, and processing of the rcfile will continue. If
330 zero, then no timeout will be used and procmail will wait
331 forever until the child has terminated; if not specified,
332 it defaults to 960 seconds.
333 MSGPREFIX Filename prefix that is used when delivering to a directory
335 (not used when delivering to a maildir or an MH directory).
336 HOST If this is not the hostname of the machine, processing of
338 the current rcfile will immediately cease. If other rcfiles
339 were specified on the command line, processing will con‐
340 tinue with the next one. If all rcfiles are exhausted, the
341 program will terminate, but will not generate an error
342 (i.e., to the mailer it will seem that the mail has been
343 delivered).
344 UMASK The name says it all (if it doesn't, then forget about this
346 one :-). Anything assigned to UMASK is taken as an octal
347 number. If not specified, the umask defaults to 077. If
348 the umask permits o+x, all the mailboxes procmail delivers
349 to directly will receive an o+x mode change. This can be
350 used to check if new mail arrived.
351 SHELLMETAS If any of the characters in SHELLMETAS appears in the line
353 specifying a filter or program, the line will be fed to
354 $SHELL instead of being executed directly.
355 SHELLFLAGS Any invocation of $SHELL will be like:
357 "$SHELL" "$SHELLFLAGS" "$*";
358 SENDMAIL If you're not using the forwarding facility don't worry
360 about this one. It specifies the program being called to
361 forward any mail.
362 It gets invoked as: "$SENDMAIL" $SENDMAILFLAGS "$@";
363 NORESRETRY Number of retries that are to be made if any `process table
365 full', `file table full', `out of memory' or `out of swap
366 space' error should occur. If this number is negative,
367 then procmail will retry indefinitely; if not specified, it
368 defaults to 4 times. The retries occur with a $SUSPEND
369 second interval. The idea behind this is that if, e.g.,
370 the swap space has been exhausted or the process table is
371 full, usually several other programs will either detect
372 this as well and abort or crash 8-), thereby freeing valu‐
373 able resources for procmail.
374 SUSPEND Number of seconds that procmail will pause if it has to
376 wait for something that is currently unavailable (memory,
377 fork, etc.); if not specified, it will default to 16 sec‐
378 onds. See also: LOCKSLEEP.
379 LINEBUF Length of the internal line buffers, cannot be set smaller
381 than 128. All lines read from the rcfile should not exceed
382 $LINEBUF characters before and after expansion. If not
383 specified, it defaults to 2048. This limit, of course,
384 does not apply to the mail itself, which can have arbitrary
385 line lengths, or could be a binary file for that matter.
386 See also PROCMAIL_OVERFLOW.
387 DELIVERED If set to `yes' procmail will pretend (to the mail agent)
389 the mail has been delivered. If mail cannot be delivered
390 after having met this assignment (set to `yes'), the mail
391 will be lost (i.e., it will not bounce).
392 TRAP When procmail terminates of its own accord and not because
394 it received a signal, it will execute the contents of this
395 variable. A copy of the mail can be read from stdin. Any
396 output produced by this command will be appended to $LOG‐
397 FILE. Possible uses for TRAP are: removal of temporary
398 files, logging customised abstracts, etc. See also EXIT‐
399 CODE and LOGABSTRACT.
400 EXITCODE By default, procmail returns an exitcode of zero (success)
402 if it successfully delivered the message or if the HOST
403 variable was misset and there were no more rcfiles on the
404 command line; otherwise it returns failure. Before doing
405 so, procmail examines the value of this variable. If it is
406 set to a positive numeric value, procmail will instead use
407 that value as its exitcode. If this variable is set but
408 empty and TRAP is set, procmail will set the exitcode to
409 whatever the TRAP program returns. If this variable is not
410 set, procmail will set it shortly before calling up the
411 TRAP program.
412 LASTFOLDER This variable is assigned to by procmail whenever it is
414 delivering to a folder or program. It always contains the
415 name of the last file (or program) procmail delivered to.
416 If the last delivery was to several directory folders
417 together then $LASTFOLDER will contain the hardlinked file‐
418 names as a space separated list.
419 MATCH This variable is assigned to by procmail whenever it is
421 told to extract text from a matching regular expression.
422 It will contain all text matching the regular expression
423 past the `\/' token.
424 SHIFT Assigning a positive value to this variable has the same
426 effect as the `shift' command in sh(1). This command is
427 most useful to extract extra arguments passed to procmail
428 when acting as a generic mailfilter.
429 INCLUDERC Names an rcfile (relative to the current directory) which
431 will be included here as if it were part of the current
432 rcfile. Nesting is permitted and only limited by systems
433 resources (memory and file descriptors). As no checking is
434 done on the permissions or ownership of the rcfile, users
435 of INCLUDERC should make sure that only trusted users have
436 write access to the included rcfile or the directory it is
437 in. Command line assignments to INCLUDERC have no effect.
438 SWITCHRC Names an rcfile (relative to the current directory) to
440 which processing will be switched. If the named rcfile
441 doesn't exist or is not a normal file or /dev/null then an
442 error will be logged and processing will continue in the
443 current rcfile. Otherwise, processing of the current
444 rcfile will be aborted and the named rcfile started.
445 Unsetting SWITCHRC aborts processing of the current rcfile
446 as if it had ended at the assignment. As with INCLUDERC,
447 no checking is done on the permissions or ownership of the
448 rcfile and command line assignments have no effect.
449 PROCMAIL_VERSION
451 The version number of the running procmail binary.
452 PROCMAIL_OVERFLOW
454 This variable will be set to a non-empty value if procmail
455 detects a buffer overflow. See the BUGS section below for
456 other details of operation when overflow occurs.
457 COMSAT Comsat(8)/biff(1) notification is on by default, it can be
459 turned off by setting this variable to `no'. Alternatively
460 the biff-service can be customised by setting it to either
461 `service@', `@hostname', or `service@hostname'. When not
462 specified it defaults to biff@localhost.
463 DROPPRIVS If set to `yes' procmail will drop all privileges it might
465 have had (suid or sgid). This is only useful if you want
466 to guarantee that the bottom half of the /etc/procmailrc
467 file is executed on behalf of the recipient.
468 Extended regular expressions
470 The following tokens are known to both the procmail internal egrep and
471 the standard egrep(1) (beware that some egrep implementations include
472 other non-standard extensions):
473 ^ Start of a line.
475 $ End of a line.
477 . Any character except a newline.
479 a* Any sequence of zero or more a's.
481 a+ Any sequence of one or more a's.
483 a? Either zero or one a.
485 [^-a-d] Any character which is not either a dash, a, b, c, d or new‐
487 line.
488 de|abc Either the sequence `de' or `abc'.
490 (abc)* Zero or more times the sequence `abc'.
492 \. Matches a single dot; use \ to quote any of the magic charac‐
494 ters to get rid of their special meaning. See also $\ vari‐
495 able substitution.
496 These were only samples, of course, any more complex combination is
498 valid as well.
499 The following token meanings are special procmail extensions:
501 ^ or $ Match a newline (for multiline matches).
503 ^^ Anchor the expression at the very start of the search area,
505 or if encountered at the end of the expression, anchor it at
506 the very end of the search area.
507 \< or \> Match the character before or after a word. They are merely
509 a shorthand for `[^a-zA-Z0-9_]', but can also match newlines.
510 Since they match actual characters, they are only suitable to
511 delimit words, not to delimit inter-word space.
512 \/ Splits the expression in two parts. Everything matching the
514 right part will be assigned to the MATCH environment vari‐
515 able.
516
518 Look in the procmailex(5) man page.
519
521 Continued lines in an action line that specifies a program always have
522 to end in a backslash, even if the underlying shell would not need or
523 want the backslash to indicate continuation. This is due to the two
524 pass parsing process needed (first procmail, then the shell (or not,
525 depending on SHELLMETAS)).
526 Don't put comments on the regular expression condition lines in a
528 recipe, these lines are fed to the internal egrep literally (except for
529 continuation backslashes at the end of a line).
530 Leading whitespace on continued regular expression condition lines is
532 usually ignored (so that they can be indented), but not on continued
533 condition lines that are evaluated according to the sh(1) substitution
534 rules inside double quotes.
535 Watch out for deadlocks when doing unhealthy things like forwarding
537 mail to your own account. Deadlocks can be broken by proper use of
538 LOCKTIMEOUT.
539 Any default values that procmail has for some environment variables
541 will always override the ones that were already defined. If you really
542 want to override the defaults, you either have to put them in the
543 rcfile or on the command line as arguments.
544 The /etc/procmailrc file cannot change the PATH setting seen by user
546 rcfiles as the value is reset when procmail finishes the /etc/proc‐
547 mailrc file. While future enhancements are expected in this area,
548 recompiling procmail with the desired value is currently the only cor‐
549 rect solution.
550 Environment variables set inside the shell-interpreted-`|' action part
552 of a recipe will not retain their value after the recipe has finished
553 since they are set in a subshell of procmail. To make sure the value
554 of an environment variable is retained you have to put the assignment
555 to the variable before the leading `|' of a recipe, so that it can cap‐
556 ture stdout of the program.
557 If you specify only a `h' or a `b' flag on a delivering recipe, and the
559 recipe matches, then, unless the `c' flag is present as well, the body
560 respectively the header of the mail will be silently lost.
561
563 procmail(1), procmailsc(5), procmailex(5), sh(1), csh(1), mail(1),
564 mailx(1), binmail(1), uucp(1), aliases(5), sendmail(8), egrep(1),
565 regexp(5), grep(1), biff(1), comsat(8), lockfile(1), formail(1)
566
568 The only substitutions of environment variables that can be handled by
569 procmail itself are of the type $name, ${name}, ${name:-text},
570 ${name:+text}, ${name-text}, ${name+text}, $\name, $#, $n, $$, $?, $_,
571 $- and $=; whereby $\name will be substituted by the all-magic-regular-
572 expression-characters-disarmed equivalent of $name, $_ by the name of
573 the current rcfile, $- by $LASTFOLDER and $= will contain the score of
574 the last recipe. Furthermore, the result of $\name substitution will
575 never be split on whitespace. When the -a or -m options are used, $#
576 will expand to the number of arguments so specified and "$@" (the
577 quotes are required) will expand to the specified arguments. However,
578 "$@" will only be expanded when used in the argument list to a program,
579 and then only one such occurrence will be expanded.
580 Unquoted variable expansions performed by procmail are always split on
582 space, tab, and newline characters; the IFS variable is not used inter‐
583 nally.
584 Procmail does not support the expansion of `~'.
586 A line buffer of length $LINEBUF is used when processing the rcfile,
588 any expansions that don't fit within this limit will be truncated and
589 PROCMAIL_OVERFLOW will be set. If the overflowing line is a condition
590 or an action line, then it will be considered failed and procmail will
591 continue processing. If it is a variable assignment or recipe start
592 line then procmail will abort the entire rcfile.
593 If the global lockfile has a relative path, and the current directory
595 is not the same as when the global lockfile was created, then the glob‐
596 al lockfile will not be removed if procmail exits at that point (reme‐
597 dy: use absolute paths to specify global lockfiles).
598 If an rcfile has a relative path and when the rcfile is first opened
600 MAILDIR contains a relative path, and if at one point procmail is in‐
601 structed to clone itself and the current directory has changed since
602 the rcfile was opened, then procmail will not be able to clone itself
603 (remedy: use an absolute path to reference the rcfile or make sure
604 MAILDIR contains an absolute path as the rcfile is opened).
605 A locallockfile on the recipe that marks the start of a non-forking
607 nested block does not work as expected.
608 When capturing stdout from a recipe into an environment variable, ex‐
610 actly one trailing newline will be stripped.
611 Some non-optimal and non-obvious regexps set MATCH to an incorrect val‐
613 ue. The regexp can be made to work by removing one or more unneeded
614 '*', '+', or '?' operator on the left-hand side of the \/ token.
615
617 If the regular expression contains `^TO_' it will be substituted by
618 `(^((Original-)?(Resent-)?(To|Cc|Bcc)|(X-Envelope
619 |Apparently(-Resent)?)-To):(.*[^-a-zA-Z0-9_.])?)', which should catch
620 all destination specifications containing a specific address.
621 If the regular expression contains `^TO' it will be substituted by
623 `(^((Original-)?(Resent-)?(To|Cc|Bcc)|(X-Envelope
624 |Apparently(-Resent)?)-To):(.*[^a-zA-Z])?)', which should catch all
625 destination specifications containing a specific word.
626 If the regular expression contains `^FROM_DAEMON' it will be substitut‐
628 ed by `(^(Mailing-List:|Precedence:.*(junk|bulk|list)|To: Multiple
629 recipients of |(((Resent-)?(From|Sender)|X-Envelope-From):|>?From
630 )([^>]*[^(.%@a-z0-9])?(Post(ma?(st(e?r)?|n)|office)|(send)?Mail(er)?
631 |daemon|m(mdf|ajordomo)|n?uucp|LIST(SERV|proc)|NETSERV|o(wner|ps)
632 |r(e(quest|sponse)|oot)|b(ounce|bs\.smtp)|echo|mirror|s(erv(ices?|er)
633 |mtp(error)?|ystem)|A(dmin(istrator)?|MMGR|utoanswer))(([^).!:a-
634 z0-9][-_a-z0-9]*)?[%@>\t ][^<)]*(\(.*\).*)?)?$([^>]|$)))', which should
635 catch mails coming from most daemons (how's that for a regular
636 expression :-).
637 If the regular expression contains `^FROM_MAILER' it will be substitut‐
639 ed by `(^(((Resent-)?(From|Sender)|X-Envelope-From):|>?From
640 )([^>]*[^(.%@a-z0-9])?(Post(ma(st(er)?|n)|office)|(send)?Mail(er)?
641 |daemon|mmdf|n?uucp|ops|r(esponse|oot)|(bbs\.)?smtp(error)?|s(erv(ices?
642 |er)|ystem)|A(dmin(istrator)?|MMGR))(([^).!:a-z0-9][-_a-z0-9]*)?[%@>\t
643 ][^<)]*(\(.*\).*)?)?$([^>]|$))' (a stripped down version of
644 `^FROM_DAEMON'), which should catch mails coming from most mailer-
645 daemons.
646 When assigning boolean values to variables like VERBOSE, DELIVERED or
648 COMSAT, procmail accepts as true every string starting with: a non-zero
649 value, `on', `y', `t' or `e'. False is every string starting with: a
650 zero value, `off', `n', `f' or `d'.
651 If the action line of a recipe specifies a program, a sole backslash-
653 newline pair in it on an otherwise empty line will be converted into a
654 newline.
655 The regular expression engine built into procmail does not support
657 named character classes.
658
660 Since unquoted leading whitespace is generally ignored in the rcfile
661 you can indent everything to taste.
662 The leading `|' on the action line to specify a program or filter is
664 stripped before checking for $SHELLMETAS.
665 Files included with the INCLUDERC directive containing only environment
667 variable assignments can be shared with sh.
668 The current behavior of assignments on the command line to INCLUDERC
670 and SWITCHRC is not guaranteed, has been changed once already, and may
671 be changed again or removed in future releases.
672 For really complicated processing you can even consider calling proc‐
674 mail recursively.
675 In the old days, the `:0' that marks the beginning of a recipe, had to
677 be changed to `:n', whereby `n' denotes the number of conditions that
678 follow.
679
681 Stephen R. van den Berg
682 <srb@cuci.nl>
683 Philip A. Guenther
684 <guenther@sendmail.com>
685BuGless 2001/08/04 PROCMAILRC(5)