Default to filesystem space/inode checking enabled

[users/jgh/exim.git] / doc / doc-docbook / spec.xfpt

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 4ebeaa0c605fc43af98bfec117622eb9b68ef274..a6d477680d800d57dfab9cd83095a70fa67112cd 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -6268,7 +6268,11 @@ Chapter &<<CHAPplaintext>>& covers both.
 Exim supports the use of regular expressions in many of its options. It
 uses the PCRE regular expression library; this provides regular expression
 matching that is compatible with Perl 5. The syntax and semantics of
 Exim supports the use of regular expressions in many of its options. It
 uses the PCRE regular expression library; this provides regular expression
 matching that is compatible with Perl 5. The syntax and semantics of

-regular expressions is discussed in many Perl reference books, and also in
+regular expressions is discussed in
+.new
+online Perl manpages, in
+.wen
+many Perl reference books, and also in

 Jeffrey Friedl's &'Mastering Regular Expressions'&, which is published by
 O'Reilly (see &url(http://www.oreilly.com/catalog/regex2/)).
 
 Jeffrey Friedl's &'Mastering Regular Expressions'&, which is published by
 O'Reilly (see &url(http://www.oreilly.com/catalog/regex2/)).
 


@@ -14320,11 +14324,15 @@ $primary_hostname-$tod_epoch-testing
 See section &<<CALLaddparcall>>& for details of how this value is used.
 
 
 See section &<<CALLaddparcall>>& for details of how this value is used.
 
 

-.option check_log_inodes main integer 0
+.new
+.option check_log_inodes main integer 100
+.wen

 See &%check_spool_space%& below.
 
 
 See &%check_spool_space%& below.
 
 

-.option check_log_space main integer 0
+.new
+.option check_log_space main integer 10M
+.wen

 See &%check_spool_space%& below.
 
 .oindex "&%check_rfc2047_length%&"
 See &%check_spool_space%& below.
 
 .oindex "&%check_rfc2047_length%&"


@@ -14339,11 +14347,15 @@ of the RFC, generates overlong encoded words. If &%check_rfc2047_length%& is
 set false, Exim recognizes encoded words of any length.
 
 
 set false, Exim recognizes encoded words of any length.
 
 

-.option check_spool_inodes main integer 0
+.new
+.option check_spool_inodes main integer 100
+.wen

 See &%check_spool_space%& below.
 
 
 See &%check_spool_space%& below.
 
 

-.option check_spool_space main integer 0
+.new
+.option check_spool_space main integer 10M
+.wen

 .cindex "checking disk space"
 .cindex "disk space, checking"
 .cindex "spool directory" "checking space"
 .cindex "checking disk space"
 .cindex "disk space, checking"
 .cindex "spool directory" "checking space"


@@ -14354,7 +14366,7 @@ message is accepted.
 .vindex "&$log_space$&"
 .vindex "&$spool_inodes$&"
 .vindex "&$spool_space$&"
 .vindex "&$log_space$&"
 .vindex "&$spool_inodes$&"
 .vindex "&$spool_space$&"

-When any of these options are set, they apply to all incoming messages. If you
+When any of these options are nonzero, they apply to all incoming messages. If you

 want to apply different checks to different kinds of message, you can do so by
 testing the variables &$log_inodes$&, &$log_space$&, &$spool_inodes$&, and
 &$spool_space$& in an ACL with appropriate additional conditions.
 want to apply different checks to different kinds of message, you can do so by
 testing the variables &$log_inodes$&, &$log_space$&, &$spool_inodes$&, and
 &$spool_space$& in an ACL with appropriate additional conditions.


@@ -14363,7 +14375,7 @@ testing the variables &$log_inodes$&, &$log_space$&, &$spool_inodes$&, and
 &%check_spool_space%& and &%check_spool_inodes%& check the spool partition if
 either value is greater than zero, for example:
 .code
 &%check_spool_space%& and &%check_spool_inodes%& check the spool partition if
 either value is greater than zero, for example:
 .code

-check_spool_space = 10M
+check_spool_space = 100M

 check_spool_inodes = 100
 .endd
 The spool partition is the one that contains the directory defined by
 check_spool_inodes = 100
 .endd
 The spool partition is the one that contains the directory defined by


@@ -14382,12 +14394,20 @@ SIZE parameter on the MAIL command, its value is added to the
 &%check_spool_space%& is zero, unless &%no_smtp_check_spool_space%& is set.
 
 The values for &%check_spool_space%& and &%check_log_space%& are held as a
 &%check_spool_space%& is zero, unless &%no_smtp_check_spool_space%& is set.
 
 The values for &%check_spool_space%& and &%check_log_space%& are held as a

-number of kilobytes. If a non-multiple of 1024 is specified, it is rounded up.
+number of kilobytes (though specified in bytes).
+If a non-multiple of 1024 is specified, it is rounded up.

 
 For non-SMTP input and for batched SMTP input, the test is done at start-up; on
 failure a message is written to stderr and Exim exits with a non-zero code, as
 it obviously cannot send an error message of any kind.
 
 
 For non-SMTP input and for batched SMTP input, the test is done at start-up; on
 failure a message is written to stderr and Exim exits with a non-zero code, as
 it obviously cannot send an error message of any kind.
 

+.new
+There is a slight performance penalty for these checks.
+Versions of Exim preceding 4.88 had these disabled by default;
+high-rate intallations confident they will never run out of resources
+may wish to deliberately disable them.
+.wen
+

 .new
 .option chunking_advertise_hosts main "host list&!!" *
 .cindex CHUNKING advertisement
 .new
 .option chunking_advertise_hosts main "host list&!!" *
 .cindex CHUNKING advertisement


@@ -35714,7 +35734,7 @@ the following table:
 &`P   `&        on &`<=`& lines: protocol used
 &`    `&        on &`=>`& and &`**`& lines: return path
 &`PRDR`&        PRDR extension used
 &`P   `&        on &`<=`& lines: protocol used
 &`    `&        on &`=>`& and &`**`& lines: return path
 &`PRDR`&        PRDR extension used

-&`PRX `&        on &'<='& and &`=>`& lines: proxy address
+&`PRX `&        on &`<=`& and &`=>`& lines: proxy address

 &`Q   `&        alternate queue name
 &`QT  `&        on &`=>`& lines: time spent on queue so far
 &`    `&        on &"Completed"& lines: time spent on queue
 &`Q   `&        alternate queue name
 &`QT  `&        on &`=>`& lines: time spent on queue so far
 &`    `&        on &"Completed"& lines: time spent on queue


@@ -38375,13 +38395,18 @@ for a match against the domain or identity that the ACL is currently verifying
 verb to a group of domains or identities. For example:
 
 .code
 verb to a group of domains or identities. For example:
 
 .code

-# Warn when Mail purportedly from GMail has no signature at all
-warn log_message = GMail sender without DKIM signature
+# Warn when Mail purportedly from GMail has no gmail signature
+warn log_message = GMail sender without gmail.com DKIM signature

      sender_domains = gmail.com
      dkim_signers = gmail.com
      dkim_status = none
 .endd
 
      sender_domains = gmail.com
      dkim_signers = gmail.com
      dkim_status = none
 .endd
 

+.new
+Note that the above does not check for a total lack of DKIM signing;
+for that check for empty &$h_DKIM-Signature:$& in the data ACL.
+.wen
+

 .vitem &%dkim_status%&
 ACL condition that checks a colon-separated list of possible DKIM verification
 results against the actual result of verification. This is typically used
 .vitem &%dkim_status%&
 ACL condition that checks a colon-separated list of possible DKIM verification
 results against the actual result of verification. This is typically used