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RedHat 9 (Linux i386) - man page for procmailrc (redhat section 5)

PROCMAILRC(5)			       File Formats Manual			    PROCMAILRC(5)

       procmailrc - procmail rcfile


       For a quick start, see NOTES at the end of the procmail(1) man page.

       The  rcfile  can contain a mixture of environment variable assignments (some of which have
       special meanings to procmail), and recipes.  In their most simple appearance, the  recipes
       are  simply one line regular expressions that are searched for in the header of the arriv-
       ing mail.  The first recipe that matches is used to determine where the	mail  has  to  go
       (usually  a  file).   If processing falls off the end of the rcfile, procmail will deliver
       the mail to $DEFAULT.

       There are two kinds of recipes: delivering and non-delivering recipes.	If  a  delivering
       recipe  is found to match, procmail considers the mail (you guessed it) delivered and will
       cease processing the rcfile after having successfully executed  the  action  line  of  the
       recipe.	 If a non-delivering recipe is found to match, processing of the rcfile will con-
       tinue after the action line of this recipe has been executed.

       Delivering recipes are those that cause header and/or body of the mail to be: written into
       a file, absorbed by a program or forwarded to a mailaddress.

       Non-delivering  recipes are: those that cause the output of a program or filter to be cap-
       tured back by procmail or those that start a nesting block.

       You can tell procmail to treat a delivering recipe as if it were a  non-delivering  recipe
       by  specifying  the  `c' flag on such a recipe.	This will make procmail generate a carbon
       copy of the mail by delivering it to this recipe, yet continue processing the rcfile.

       By using any number of recipes you can presort your mail  extremely  straightforward  into
       several	mailfolders.   Bear in mind though that the mail can arrive concurrently in these
       mailfolders (if several procmail programs happen to run at the same time, not unlikely  if
       a  lot of mail arrives).  To make sure this does not result in a mess, proper use of lock-
       files is highly recommended.

       The environment variable assignments and recipes can be freely intermixed in  the  rcfile.
       If  any	environment variable has a special meaning to procmail, it will be used appropri-
       ately the moment it is parsed (i.e., you can change the	current  directory  whenever  you
       want  by  specifying  a new MAILDIR, switch lockfiles by specifying a new LOCKFILE, change
       the umask at any time, etc., the possibilities are endless :-).

       The assignments and substitutions of these environment variables are handled exactly  like
       in sh(1) (that includes all possible quotes and escapes), with the added bonus that blanks
       around the '=' sign are ignored and that, if an environment  variable  appears  without	a
       trailing  '=', it will be removed from the environment.	Any program in backquotes started
       by procmail will have the entire mail at its stdin.

       A word beginning with # and all the following characters up  to	a  NEWLINE  are  ignored.
       This does not apply to condition lines, which cannot be commented.

       A line starting with ':' marks the beginning of a recipe.  It has the following format:

	      :0 [flags] [ : [locallockfile] ]
	      <zero or more conditions (one per line)>
	      <exactly one action line>

       Conditions  start  with a leading `*', everything after that character is passed on to the
       internal egrep literally, except for  leading  and  trailing  whitespace.   These  regular
       expressions are completely compatible to the normal egrep(1) extended regular expressions.
       See also Extended regular expressions.

       Conditions are anded; if there are no conditions the result will be true by default.

       Flags can be any of the following:

       H    Egrep the header (default).

       B    Egrep the body.

       D    Tell the internal egrep to distinguish between upper and lower case (contrary to  the
	    default which is to ignore case).

       A    This  recipe  will not be executed unless the conditions on the last preceding recipe
	    (on the current block-nesting level) without the `A' or `a'  flag  matched	as  well.
	    This allows you to chain actions that depend on a common condition.

       a    Has  the same meaning as the `A' flag, with the additional condition that the immedi-
	    ately preceding recipe must have been successfully completed before  this  recipe  is

       E    This recipe only executes if the immediately preceding recipe was not executed.  Exe-
	    cution of this recipe also disables any immediately following recipes  with  the  'E'
	    flag.  This allows you to specify `else if' actions.

       e    This  recipe  only	executes  if  the  immediately preceding recipe failed (i.e., the
	    action line was attempted, but resulted in an error).

       h    Feed the header to the pipe, file or mail destination (default).

       b    Feed the body to the pipe, file or mail destination (default).

       f    Consider the pipe as a filter.

       c    Generate a carbon copy of this mail.  This only makes sense  on  delivering  recipes.
	    The  only  non-delivering recipe this flag has an effect on is on a nesting block, in
	    order to generate a carbon copy this will clone the running procmail  process  (lock-
	    files  will not be inherited), whereby the clone will proceed as usual and the parent
	    will jump across the block.

       w    Wait for the filter or program to finish and check its exitcode  (normally	ignored);
	    if the filter is unsuccessful, then the text will not have been filtered.

       W    Has  the  same  meaning as the `w' flag, but will suppress any `Program failure' mes-

       i    Ignore any write errors on this recipe (i.e., usually due to an early closed pipe).

       r    Raw mode, do not try to ensure the mail ends with an empty line, write it out as is.

       There are some special conditions you can use that are not straight  regular  expressions.
       To select them, the condition must start with:

       !    Invert the condition.

       $    Evaluate the remainder of this condition according to sh(1) substitution rules inside
	    double quotes, skip leading whitespace, then reparse it.

       ?    Use the exitcode of the specified program.

       <    Check if the total length of the mail is shorter than the specified (in decimal) num-
	    ber of bytes.

       >    Analogous to '<'.

       variablename ??
	    Match  the remainder of this condition against the value of this environment variable
	    (which cannot be a pseudo variable).  A special case is if variablename is	equal  to
	    `B',  `H',	`HB'  or  `BH'; this merely overrides the default header/body search area
	    defined by the initial flags on this recipe.

       \    To quote any of the above at the start of the line.

   Local lockfile
       If you put a second (trailing) ':' on the first recipe line,  then  procmail  will  use	a
       locallockfile  (for  this  recipe  only).  You can optionally specify the locallockfile to
       use; if you don't however, procmail will use the destination  filename  (or  the  filename
       following the first '>>') and will append $LOCKEXT to it.

   Recipe action line
       The action line can start with the following characters:

       !      Forwards to all the specified mail addresses.

       |      Starts  the  specified program, possibly in $SHELL if any of the characters $SHELL-
	      METAS are spotted.  You can optionally prepend this  pipe  symbol  with  variable=,
	      which  will  cause stdout of the program to be captured in the environment variable
	      (procmail will not terminate processing the rcfile at this point).  If you  specify
	      just  this  pipe	symbol,  without any program, then procmail will pipe the mail to

       {      Followed by at least one space, tab or newline will mark the  start  of  a  nesting
	      block.   Everything  up  till  the next closing brace will depend on the conditions
	      specified for this recipe.  Unlimited nesting  is  permitted.   The  closing  brace
	      exists  merely to delimit the block, it will not cause procmail to terminate in any
	      way.  If the end of a block is reached processing will continue as usual after  the
	      block.   On a nesting block, the flags `H' and `B' only affect the conditions lead-
	      ing up to the block, the flags `h' and `b' have no effect whatsoever.

       Anything else will be taken as a mailbox name (either a filename or a directory,  absolute
       or  relative  to  the current directory (see MAILDIR)).	If it is a (possibly yet nonexis-
       tent) filename, the mail will be appended to it.

       If it is a directory, the mail will be delivered to a  newly  created,  guaranteed  to  be
       unique  file  named  $MSGPREFIX*  in the specified directory.  If the mailbox name ends in
       "/.", then this directory is presumed to be an MH folder; i.e., procmail will use the next
       number  it  finds available.  If the mailbox name ends in "/", then this directory is pre-
       sumed to be a maildir folder; i.e., procmail will deliver the message to a file in a  sub-
       directory named "tmp" and rename it to be inside a subdirectory named "new".  If the mail-
       box is specified to be an MH folder or maildir folder, procmail will create the	necessary
       directories if they don't exist, rather than treat the mailbox as a non-existent filename.
       When procmail is delivering to  directories,  you  can  specify	multiple  directories  to
       deliver to (procmail will do so utilising hardlinks).

   Environment variable defaults
			     Your (the recipient's) defaults

       PATH		     $HOME/bin:/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin
			     :/usr/X11R6/bin (Except during the processing of an  /etc/procmailrc
			     file, when it will be set to `/bin:/usr/bin:/usr/local/bin

       SHELLMETAS	     &|<>~;?*[

       SHELLFLAGS	     -c

       ORGMAIL		     /var/spool/mail/$LOGNAME
			     (Unless -m has been specified, in which case it is unset)

       MAILDIR		     $HOME
			     (Unless the name of the first successfully opened rcfile starts with
			     `./' or if -m has been specified, in which case it defaults to `.')

       DEFAULT		     $ORGMAIL

       MSGPREFIX	     msg.

       SENDMAIL 	     /usr/sbin/sendmail

       SENDMAILFLAGS	     -oi

       HOST		     The current hostname

       COMSAT		     no
			     (If an rcfile is specified on the command line)

       PROCMAIL_VERSION      3.22

       LOCKEXT		     .lock

       Other cleared or preset environment variables are IFS, ENV and PWD.

       For  security  reasons, upon startup procmail will wipe out all environment variables that
       are suspected of modifying the behavior of the runtime linker.

       Before you get lost in the multitude of environment variables, keep in mind  that  all  of
       them have reasonable defaults.

       MAILDIR	   Current  directory  while procmail is executing (that means that all paths are
		   relative to $MAILDIR).

       DEFAULT	   Default mailbox file (if not told otherwise, procmail will dump mail  in  this
		   mailbox).   Procmail will automatically use $DEFAULT$LOCKEXT as lockfile prior
		   to writing to this mailbox.	You do not need to set this  variable,	since  it
		   already points to the standard system mailbox.

       LOGFILE	   This  file  will  also  contain any error or diagnostic messages from procmail
		   (normally none :-) or any other programs started by procmail.  If this file is
		   not	specified,  any  diagnostics or error messages will be mailed back to the
		   sender.  See also LOGABSTRACT.

       VERBOSE	   You can turn on extended diagnostics by setting  this  variable  to	`yes'  or
		   `on', to turn it off again set it to `no' or `off'.

       LOGABSTRACT Just  before  procmail  exits  it logs an abstract of the delivered message in
		   $LOGFILE showing the `From ' and `Subject:' fields of the header, what  folder
		   it  finally	went to and how long (in bytes) the message was.  By setting this
		   variable to `no', generation of this abstract is suppressed.  If you set it to
		   `all', procmail will log an abstract for every successful delivering recipe it

       LOG	   Anything assigned to this variable will be appended to $LOGFILE.

       ORGMAIL	   Usually the system mailbox (ORiGinal MAILbox).  If, for  some  obscure  reason
		   (like  `filesystem  full')  the mail could not be delivered, then this mailbox
		   will be the last resort.  If procmail fails to save the mail  in  here  (deep,
		   deep trouble :-), then the mail will bounce back to the sender.

       LOCKFILE    Global  semaphore file.  If this file already exists, procmail will wait until
		   it has gone before proceeding, and will create it itself (cleaning it up  when
		   ready, of course).  If more than one lockfile are specified, then the previous
		   one will be removed before trying to create the new one.  The use of a  global
		   lockfile is discouraged, whenever possible use locallockfiles (on a per recipe
		   basis) instead.

       LOCKEXT	   Default extension that is appended to a destination	file  to  determine  what
		   local lockfile to use (only if turned on, on a per-recipe basis).

       LOCKSLEEP   Number  of  seconds	procmail  will sleep before retrying on a lockfile (if it
		   already existed); if not specified, it defaults to 8 seconds.

       LOCKTIMEOUT Number of seconds that have to have passed since a  lockfile  was  last  modi-
		   fied/created before procmail decides that this must be an erroneously leftover
		   lockfile that can be removed by force now.  If zero, then no timeout  will  be
		   used  and  procmail	will  wait  forever until the lockfile is removed; if not
		   specified, it defaults to 1024 seconds.  This variable is  useful  to  prevent
		   indefinite  hangups	of  sendmail/procmail.	 Procmail is immune to clock skew
		   across machines.

       TIMEOUT	   Number of seconds that have to have passed before procmail decides  that  some
		   child it started must be hanging.  The offending program will receive a TERMI-
		   NATE signal from procmail, and processing of the  rcfile  will  continue.   If
		   zero,  then	no  timeout will be used and procmail will wait forever until the
		   child has terminated; if not specified, it defaults to 960 seconds.

       MSGPREFIX   Filename prefix that is used when delivering to a  directory  (not  used  when
		   delivering to a maildir or an MH directory).

       HOST	   If  this  is not the hostname of the machine, processing of the current rcfile
		   will immediately cease. If other rcfiles were specified on the  command  line,
		   processing will continue with the next one.	If all rcfiles are exhausted, the
		   program will terminate, but will not generate an error (i.e., to the mailer it
		   will seem that the mail has been delivered).

       UMASK	   The name says it all (if it doesn't, then forget about this one :-).  Anything
		   assigned to UMASK is taken as an octal number.  If not  specified,  the  umask
		   defaults  to 077.  If the umask permits o+x, all the mailboxes procmail deliv-
		   ers to directly will receive an o+x mode change.  This can be used to check if
		   new mail arrived.

       SHELLMETAS  If any of the characters in SHELLMETAS appears in the line specifying a filter
		   or program, the line will be fed to $SHELL instead of being executed directly.

       SHELLFLAGS  Any invocation of $SHELL will be like:
		   "$SHELL" "$SHELLFLAGS" "$*";

       SENDMAIL    If you're not using the forwarding facility don't worry about  this	one.   It
		   specifies the program being called to forward any mail.
		   It gets invoked as: "$SENDMAIL" $SENDMAILFLAGS "$@";

       NORESRETRY  Number of retries that are to be made if any `process table full', `file table
		   full', `out of memory' or `out of swap space' error	should	occur.	 If  this
		   number  is  negative, then procmail will retry indefinitely; if not specified,
		   it defaults to 4 times.  The retries occur with a  $SUSPEND	second	interval.
		   The	idea  behind  this is that if, e.g., the swap space has been exhausted or
		   the process table is full, usually several other programs will  either  detect
		   this  as  well  and abort or crash 8-), thereby freeing valuable resources for

       SUSPEND	   Number of seconds that procmail will pause if it has  to  wait  for	something
		   that  is currently unavailable (memory, fork, etc.); if not specified, it will
		   default to 16 seconds.  See also: LOCKSLEEP.

       LINEBUF	   Length of the internal line buffers, cannot be  set	smaller  than  128.   All
		   lines  read	from  the rcfile should not exceed $LINEBUF characters before and
		   after expansion.  If not specified, it  defaults  to  2048.	 This  limit,  of
		   course,  does  not  apply  to  the  mail itself, which can have arbitrary line
		   lengths, or could be a binary file for that matter.	See  also  PROCMAIL_OVER-

       DELIVERED   If  set  to	`yes' procmail will pretend (to the mail agent) the mail has been
		   delivered.  If mail cannot be delivered after having met this assignment  (set
		   to `yes'), the mail will be lost (i.e., it will not bounce).

       TRAP	   When  procmail terminates of its own accord and not because it received a sig-
		   nal, it will execute the contents of this variable.	A copy of the mail can be
		   read  from  stdin.	Any  output  produced by this command will be appended to
		   $LOGFILE.  Possible uses for TRAP are: removal  of  temporary  files,  logging
		   customised abstracts, etc.  See also EXITCODE and LOGABSTRACT.

       EXITCODE    By  default, procmail returns an exitcode of zero (success) if it successfully
		   delivered the message or if the HOST variable was misset  and  there  were  no
		   more  rcfiles on the command line; otherwise it returns failure.  Before doing
		   so, procmail examines the value of this variable.  If it is set to a  positive
		   numeric  value, procmail will instead use that value as its exitcode.  If this
		   variable is set but empty and TRAP is set, procmail will set the  exitcode  to
		   whatever the TRAP program returns.  If this variable is not set, procmail will
		   set it shortly before calling up the TRAP program.

       LASTFOLDER  This variable is assigned to by procmail whenever it is delivering to a folder
		   or  program.   It always contains the name of the last file (or program) proc-
		   mail delivered to.  If the last delivery  was  to  several  directory  folders
		   together  then  $LASTFOLDER	will  contain the hardlinked filenames as a space
		   separated list.

       MATCH	   This variable is assigned to by procmail whenever it is told to  extract  text
		   from  a  matching  regular  expression.  It will contain all text matching the
		   regular expression past the `\/' token.

       SHIFT	   Assigning a positive value to this variable has the same effect as the `shift'
		   command  in	sh(1).	 This  command	is most useful to extract extra arguments
		   passed to procmail when acting as a generic mailfilter.

       INCLUDERC   Names an rcfile (relative to the current directory)	which  will  be  included
		   here  as if it were part of the current rcfile.  Nesting is permitted and only
		   limited by systems resources (memory and file descriptors).	As no checking is
		   done  on the permissions or ownership of the rcfile, users of INCLUDERC should
		   make sure that only trusted users have write access to the included rcfile  or
		   the directory it is in.  Command line assignments to INCLUDERC have no effect.

       SWITCHRC    Names  an  rcfile (relative to the current directory) to which processing will
		   be switched.  If the named rcfile doesn't exist or is not  a  normal  file  or
		   /dev/null  then  an	error  will be logged and processing will continue in the
		   current rcfile.  Otherwise, processing of the current rcfile will  be  aborted
		   and	the  named  rcfile  started.  Unsetting SWITCHRC aborts processing of the
		   current rcfile as if it had ended at the assignment.  As  with  INCLUDERC,  no
		   checking  is  done  on  the permissions or ownership of the rcfile and command
		   line assignments have no effect.

		   The version number of the running procmail binary.

		   This variable will be set to a non-empty value if procmail  detects	a  buffer
		   overflow.   See  the  BUGS  section	below for other details of operation when
		   overflow occurs.

       COMSAT	   Comsat(8)/biff(1) notification is on by default, it can be turned off by  set-
		   ting  this variable to `no'.  Alternatively the biff-service can be customised
		   by setting it to either `service@', `@hostname', or `service@hostname'.   When
		   not specified it defaults to biff@localhost.

       DROPPRIVS   If  set  to `yes' procmail will drop all privileges it might have had (suid or
		   sgid).  This is only useful if you want to guarantee that the bottom  half  of
		   the /etc/procmailrc file is executed on behalf of the recipient.

   Extended regular expressions
       The  following  tokens  are  known  to  both  the procmail internal egrep and the standard
       egrep(1) (beware that some egrep implementations include other non-standard extensions):

       ^	 Start of a line.

       $	 End of a line.

       .	 Any character except a newline.

       a*	 Any sequence of zero or more a's.

       a+	 Any sequence of one or more a's.

       a?	 Either zero or one a.

       [^-a-d]	 Any character which is not either a dash, a, b, c, d or newline.

       de|abc	 Either the sequence `de' or `abc'.

       (abc)*	 Zero or more times the sequence `abc'.

       \.	 Matches a single dot; use \ to quote any of the magic characters to get  rid  of
		 their special meaning.  See also $\ variable substitution.

       These were only samples, of course, any more complex combination is valid as well.

       The following token meanings are special procmail extensions:

       ^ or $	 Match a newline (for multiline matches).

       ^^	 Anchor the expression at the very start of the search area, or if encountered at
		 the end of the expression, anchor it at the very end of the search area.

       \< or \>  Match the character before or after a word.  They are	merely	a  shorthand  for
		 `[^a-zA-Z0-9_]',  but	can also match newlines.  Since they match actual charac-
		 ters, they are only suitable to delimit words, not to delimit inter-word space.

       \/	 Splits the expression in two parts.  Everything matching the right part will  be
		 assigned to the MATCH environment variable.

       Look in the procmailex(5) man page.

       Continued  lines  in an action line that specifies a program always have to end in a back-
       slash, even if the underlying shell would not need or want the backslash to indicate  con-
       tinuation.   This  is due to the two pass parsing process needed (first procmail, then the
       shell (or not, depending on SHELLMETAS)).

       Don't put comments on the regular expression condition lines in a recipe, these lines  are
       fed  to	the internal egrep literally (except for continuation backslashes at the end of a

       Leading whitespace on continued regular expression condition lines is usually ignored  (so
       that  they  can	be  indented),	but  not  on continued condition lines that are evaluated
       according to the sh(1) substitution rules inside double quotes.

       Watch out for deadlocks when doing unhealthy things  like  forwarding  mail  to	your  own
       account.  Deadlocks can be broken by proper use of LOCKTIMEOUT.

       Any  default  values that procmail has for some environment variables will always override
       the ones that were already defined.  If you really want	to  override  the  defaults,  you
       either have to put them in the rcfile or on the command line as arguments.

       The  /etc/procmailrc file cannot change the PATH setting seen by user rcfiles as the value
       is reset when procmail finishes the /etc/procmailrc file.  While future	enhancements  are
       expected  in  this area, recompiling procmail with the desired value is currently the only
       correct solution.

       Environment variables set inside the shell-interpreted-`|' action part of  a  recipe  will
       not  retain  their value after the recipe has finished since they are set in a subshell of
       procmail.  To make sure the value of an environment variable is retained you have  to  put
       the  assignment to the variable before the leading `|' of a recipe, so that it can capture
       stdout of the program.

       If you specify only a `h' or a `b' flag on a delivering recipe, and  the  recipe  matches,
       then, unless the `c' flag is present as well, the body respectively the header of the mail
       will be silently lost.

       procmail(1), procmailsc(5), procmailex(5), sh(1), csh(1), mail(1), mailx(1), binmail(1),
       uucp(1), aliases(5), sendmail(8), egrep(1), regexp(5), grep(1), biff(1), comsat(8),
       lockfile(1), formail(1)

       The only substitutions of environment variables that can be handled by procmail itself are
       of  the	type  $name,  ${name},	${name:-text}, ${name:+text}, ${name-text}, ${name+text},
       $\name, $#, $n, $$, $?, $_, $- and $=; whereby $\name will be substituted by the  all-mag-
       ic-regular-expression-characters-disarmed  equivalent of $name, $_ by the name of the cur-
       rent rcfile, $- by $LASTFOLDER and $= will contain the score of the last recipe.  Further-
       more, the result of $\name substitution will never be split on whitespace.  When the -a or
       -m options are used, $# will expand to the number of arguments so specified and "$@"  (the
       quotes  are  required) will expand to the specified arguments.  However, "$@" will only be
       expanded when used in the argument list to a program, and then only  one  such  occurrence
       will be expanded.

       Unquoted  variable  expansions  performed  by procmail are always split on space, tab, and
       newline characters; the IFS variable is not used internally.

       Procmail does not support the expansion of `~'.

       A line buffer of length $LINEBUF is used when processing the rcfile, any  expansions  that
       don't  fit  within this limit will be truncated and PROCMAIL_OVERFLOW will be set.  If the
       overflowing line is a condition or an action line, then it will be considered  failed  and
       procmail  will  continue  processing.  If it is a variable assignment or recipe start line
       then procmail will abort the entire rcfile.

       If the global lockfile has a relative path, and the current directory is not the  same  as
       when  the  global  lockfile  was  created, then the global lockfile will not be removed if
       procmail exits at that point (remedy: use absolute paths to specify global lockfiles).

       If an rcfile has a relative path and when the rcfile is first opened  MAILDIR  contains	a
       relative  path, and if at one point procmail is instructed to clone itself and the current
       directory has changed since the rcfile was opened, then procmail will not be able to clone
       itself (remedy: use an absolute path to reference the rcfile or make sure MAILDIR contains
       an absolute path as the rcfile is opened).

       A locallockfile on the recipe that marks the start of a non-forking nested block does  not
       work as expected.

       When  capturing	stdout	from  a recipe into an environment variable, exactly one trailing
       newline will be stripped.

       Some non-optimal and non-obvious regexps set MATCH to an incorrect value.  The regexp  can
       be made to work by removing one or more unneeded

       If the regular expression contains `^TO_' it will be substituted by
       Z0-9_.])?)', which should catch all destination specifications containing a specific

       If the regular expression contains `^TO' it will be substituted by
       Z])?)', which should catch all destination specifications containing a specific word.

       If the regular expression contains `^FROM_DAEMON' it will be substituted by `(^(Mailing-
       List:|Precedence:.*(junk|bulk|list)|To: Multiple recipients of |(((Resent-)?(From|Sender)
       |X-Envelope-From):|>?From )([^>]*[^(.%@a-z0-9])?(Post(ma?(st(e?r)?|n)|office)
       ][^<)]*(\(.*\).*)?)?$([^>]|$)))', which should catch mails coming from most daemons (how's
       that for a regular expression :-).

       If the regular expression contains `^FROM_MAILER' it will be substituted by
       `(^(((Resent-)?(From|Sender)|X-Envelope-From):|>?From )([^>]*[^(.%@a-
       z0-9]*)?[%@>\t ][^<)]*(\(.*\).*)?)?$([^>]|$))' (a stripped down version of
       `^FROM_DAEMON'), which should catch mails coming from most mailer-daemons.

       When assigning boolean values to variables like VERBOSE, DELIVERED or COMSAT, procmail ac-
       cepts  as true every string starting with: a non-zero value, `on', `y', `t' or `e'.  False
       is every string starting with: a zero value, `off', `n', `f' or `d'.

       If the action line of a recipe specifies a program, a sole backslash-newline pair in it on
       an otherwise empty line will be converted into a newline.

       The  regular expression engine built into procmail does not support named character class-

       Since unquoted leading whitespace is generally ignored in the rcfile you can indent every-
       thing to taste.

       The  leading  `|'  on  the  action  line to specify a program or filter is stripped before
       checking for $SHELLMETAS.

       Files included with the INCLUDERC directive containing only environment	variable  assign-
       ments can be shared with sh.

       The  current  behavior of assignments on the command line to INCLUDERC and SWITCHRC is not
       guaranteed, has been changed once already, and may be changed again or removed  in  future

       For really complicated processing you can even consider calling procmail recursively.

       In the old days, the `:0' that marks the beginning of a recipe, had to be changed to `:n',
       whereby `n' denotes the number of conditions that follow.

       Stephen R. van den Berg
       Philip A. Guenther

BuGless 				    2001/08/04				    PROCMAILRC(5)

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