New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1

[users/jgh/exim.git] / src / src / EDITME

diff --git a/src/src/EDITME b/src/src/EDITME
index b70c3272bab2272b131d84f421e6ec4b7b5839b0..833c3f8cac77130f4048bdd8bd9e1368cf507a9e 100644 (file)
--- a/src/src/EDITME
+++ b/src/src/EDITME
@@ -1,4 +1,4 @@
-# $Cambridge: exim/src/src/EDITME,v 1.6 2004/12/17 14:52:44 ph10 Exp $
+# $Cambridge: exim/src/src/EDITME,v 1.27 2010/06/12 15:21:25 jetmore Exp $

 
 ##################################################
 #          The Exim mail transport agent         #
 
 ##################################################
 #          The Exim mail transport agent         #


@@ -131,8 +131,7 @@ CONFIGURE_FILE=/usr/exim/configure
 # group that is used for Exim processes when they no longer need to be root. In
 # particular, this applies when receiving messages and when doing remote
 # deliveries. (Local deliveries run as various non-root users, typically as the
 # group that is used for Exim processes when they no longer need to be root. In
 # particular, this applies when receiving messages and when doing remote
 # deliveries. (Local deliveries run as various non-root users, typically as the

-# owner of a local mailbox.) Specifying these values as root is very strongly
-# discouraged.
+# owner of a local mailbox.) Specifying these values as root is not supported.

 
 EXIM_USER=
 
 
 EXIM_USER=
 


@@ -184,6 +183,12 @@ SPOOL_DIRECTORY=/var/spool/exim
 #           THESE ARE THINGS YOU PROBABLY WANT TO SPECIFY                     #
 ###############################################################################
 
 #           THESE ARE THINGS YOU PROBABLY WANT TO SPECIFY                     #
 ###############################################################################
 

+# If you need extra header file search paths on all compiles, put the -I
+# options in INCLUDE.  If you want the extra searches only for certain
+# parts of the build, see more specific xxx_INCLUDE variables below.
+
+# INCLUDE=-I/example/include
+

 # You need to specify some routers and transports if you want the Exim that you
 # are building to be capable of delivering mail. You almost certainly need at
 # least one type of lookup. You should consider whether you want to build
 # You need to specify some routers and transports if you want the Exim that you
 # are building to be capable of delivering mail. You almost certainly need at
 # least one type of lookup. You should consider whether you want to build


@@ -243,6 +248,19 @@ TRANSPORT_SMTP=yes
 # SUPPORT_MBX=yes
 
 
 # SUPPORT_MBX=yes
 
 

+#------------------------------------------------------------------------------
+# See below for dynamic lookup modules.
+# LOOKUP_MODULE_DIR=/usr/lib/exim/lookups/
+# If not using package management but using this anyway, then think about how
+# you perform upgrades and revert them. You should consider the benefit of
+# embedding the Exim version number into LOOKUP_MODULE_DIR, so that you can
+# maintain two concurrent sets of modules.
+
+# To build a module dynamically, you'll need to define CFLAGS_DYNAMIC for
+# your platform.  Eg:
+# CFLAGS_DYNAMIC=-shared -rdynamic
+# CFLAGS_DYNAMIC=-shared -rdynamic -fPIC
+

 #------------------------------------------------------------------------------
 # These settings determine which file and database lookup methods are included
 # in the binary. See the manual chapter entitled "File and database lookups"
 #------------------------------------------------------------------------------
 # These settings determine which file and database lookup methods are included
 # in the binary. See the manual chapter entitled "File and database lookups"


@@ -251,12 +269,24 @@ TRANSPORT_SMTP=yes
 # LOOKUP_DNSDB does *not* refer to general mail routing using the DNS. It is
 # for the specialist case of using the DNS as a general database facility (not
 # common).
 # LOOKUP_DNSDB does *not* refer to general mail routing using the DNS. It is
 # for the specialist case of using the DNS as a general database facility (not
 # common).

+# If set to "2" instead of "yes" then the corresponding lookup will be
+# built as a module and must be installed into LOOKUP_MODULE_DIR. You need to
+# add -export-dynamic -rdynamic to EXTRALIBS. You may also need to add -ldl to
+# EXTRALIBS so that dlopen() is available to Exim. You need to define
+# LOOKUP_MODULE_DIR above so the exim binary actually loads dynamic lookup
+# modules.
+# Also, instead of adding all the libraries/includes to LOOKUP_INCLUDE and
+# LOOKUP_LIBS, add them to the respective LOOKUP_*_INCLUDE and LOOKUP_*_LIBS
+# (where * is the name as given here in this list). That ensures that only
+# the dynamic library and not the exim binary will be linked against the
+# library.
+# NOTE: LDAP cannot be built as a module!

 
 LOOKUP_DBM=yes
 LOOKUP_LSEARCH=yes
 
 LOOKUP_DBM=yes
 LOOKUP_LSEARCH=yes

+LOOKUP_DNSDB=yes

 
 # LOOKUP_CDB=yes
 
 # LOOKUP_CDB=yes

-# LOOKUP_DNSDB=yes

 # LOOKUP_DSEARCH=yes
 # LOOKUP_IBASE=yes
 # LOOKUP_LDAP=yes
 # LOOKUP_DSEARCH=yes
 # LOOKUP_IBASE=yes
 # LOOKUP_LDAP=yes


@@ -266,6 +296,7 @@ LOOKUP_LSEARCH=yes
 # LOOKUP_ORACLE=yes
 # LOOKUP_PASSWD=yes
 # LOOKUP_PGSQL=yes
 # LOOKUP_ORACLE=yes
 # LOOKUP_PASSWD=yes
 # LOOKUP_PGSQL=yes

+# LOOKUP_SQLITE=yes

 # LOOKUP_WHOSON=yes
 
 # These two settings are obsolete; all three lookups are compiled when
 # LOOKUP_WHOSON=yes
 
 # These two settings are obsolete; all three lookups are compiled when


@@ -293,16 +324,30 @@ LOOKUP_LSEARCH=yes
 # Michigan (OpenLDAP 1) library.
 
 
 # Michigan (OpenLDAP 1) library.
 
 

+#------------------------------------------------------------------------------
+# The PCRE library is required for exim.  There is no longer an embedded
+# version of the PCRE library included with the source code, instead you
+# must use a system library or build your own copy of PCRE.
+# In either case you must specify the library link info here.  If the
+# PCRE header files are not in the standard search path you must also
+# modify the INCLUDE path (above)
+# The default setting of PCRE_LIBS should work on the vast majority of
+# systems
+
+PCRE_LIBS=-lpcre
+
+

 #------------------------------------------------------------------------------
 # Additional libraries and include directories may be required for some
 # lookup styles (e.g. LDAP, MYSQL or PGSQL). LOOKUP_LIBS is included only on
 # the command for linking Exim itself, not on any auxiliary programs. You
 # don't need to set LOOKUP_INCLUDE if the relevant directories are already
 # specified in INCLUDE. The settings below are just examples; -lpq is for
 #------------------------------------------------------------------------------
 # Additional libraries and include directories may be required for some
 # lookup styles (e.g. LDAP, MYSQL or PGSQL). LOOKUP_LIBS is included only on
 # the command for linking Exim itself, not on any auxiliary programs. You
 # don't need to set LOOKUP_INCLUDE if the relevant directories are already
 # specified in INCLUDE. The settings below are just examples; -lpq is for

-# PostgreSQL, -lgds is for Interbase.
+# PostgreSQL, -lgds is for Interbase, -lsqlite3 is for SQLite.

 
 # LOOKUP_INCLUDE=-I /usr/local/ldap/include -I /usr/local/mysql/include -I /usr/local/pgsql/include
 
 # LOOKUP_INCLUDE=-I /usr/local/ldap/include -I /usr/local/mysql/include -I /usr/local/pgsql/include

-# LOOKUP_LIBS=-L/usr/local/lib -lldap -llber -lmysqlclient -lpq -lgds
+# LOOKUP_LIBS=-L/usr/local/lib -lldap -llber -lmysqlclient -lpq -lgds -lsqlite3
+

 
 #------------------------------------------------------------------------------
 # Compiling the Exim monitor: If you want to compile the Exim monitor, a
 
 #------------------------------------------------------------------------------
 # Compiling the Exim monitor: If you want to compile the Exim monitor, a


@@ -314,6 +359,7 @@ LOOKUP_LSEARCH=yes
 
 EXIM_MONITOR=eximon.bin
 
 
 EXIM_MONITOR=eximon.bin
 

+

 #------------------------------------------------------------------------------
 # Compiling Exim with content scanning support: If you want to compile Exim
 # with support for message body content scanning, set WITH_CONTENT_SCAN to
 #------------------------------------------------------------------------------
 # Compiling Exim with content scanning support: If you want to compile Exim
 # with support for message body content scanning, set WITH_CONTENT_SCAN to


@@ -330,6 +376,25 @@ EXIM_MONITOR=eximon.bin
 
 # WITH_OLD_DEMIME=yes
 
 
 # WITH_OLD_DEMIME=yes
 

+# If you're using ClamAV and are backporting fixes to an old version, instead
+# of staying current (which is the more usual approach) then you may need to
+# use an older API which uses a STREAM command, now deprecated, instead of
+# zINSTREAM.  If you need to set this, please let the Exim developers know, as
+# if nobody reports a need for it, we'll remove this option and clean up the
+# code.  zINSTREAM was introduced with ClamAV 0.95.
+#
+# WITH_OLD_CLAMAV_STREAM=yes
+
+#------------------------------------------------------------------------------
+# By default Exim includes code to support DKIM (DomainKeys Identified
+# Mail, RFC4871) signing and verification.  Verification of signatures is
+# turned on by default.  See the spec for information on conditionally
+# disabling it.  To disable the inclusion of the entire feature, set
+# DISABLE_DKIM to "yes"
+
+# DISABLE_DKIM=yes
+
+

 #------------------------------------------------------------------------------
 # Compiling Exim with experimental features. These are documented in
 # experimental-spec.txt. "Experimental" means that the way these features are
 #------------------------------------------------------------------------------
 # Compiling Exim with experimental features. These are documented in
 # experimental-spec.txt. "Experimental" means that the way these features are


@@ -359,7 +424,7 @@ EXIM_MONITOR=eximon.bin
 
 # EXPERIMENTAL_BRIGHTMAIL=yes
 # CFLAGS  += -I/opt/brightmail/bsdk-6.0/include
 
 # EXPERIMENTAL_BRIGHTMAIL=yes
 # CFLAGS  += -I/opt/brightmail/bsdk-6.0/include

-# LDFLAGS += -lxml2 -lbmiclient_single -L/opt/brightmail/bsdk-6.0/lib
+# LDFLAGS += -lxml2_single -lbmiclient_single -L/opt/brightmail/bsdk-6.0/lib

 
 
 
 
 
 


@@ -390,14 +455,13 @@ FIXED_NEVER_USERS=root
 
 
 #------------------------------------------------------------------------------
 
 
 #------------------------------------------------------------------------------

-# By default, Exim insists that its configuration file be owned either by root
-# or by the Exim user. You can specify one additional permitted owner here.
+# By default, Exim insists that its configuration file be owned by root. You
+# can specify one additional permitted owner here.

 
 # CONFIGURE_OWNER=
 
 # If the configuration file is group-writeable, Exim insists by default that it
 
 # CONFIGURE_OWNER=
 
 # If the configuration file is group-writeable, Exim insists by default that it

-# is owned by root or the Exim user. You can specify one additional permitted 
-# group owner here.
+# is owned by root. You can specify one additional permitted group owner here.

 
 # CONFIGURE_GROUP=
 
 
 # CONFIGURE_GROUP=
 


@@ -419,32 +483,31 @@ FIXED_NEVER_USERS=root
 
 #------------------------------------------------------------------------------
 # The -C option allows Exim to be run with an alternate runtime configuration
 
 #------------------------------------------------------------------------------
 # The -C option allows Exim to be run with an alternate runtime configuration

-# file. When this is used by root or the Exim user, root privilege is retained
-# by the binary (for any other caller, it is dropped). You can restrict the
-# location of alternate configurations by defining a prefix below. Any file
-# used with -C must then start with this prefix (except that /dev/null is also
-# permitted if the caller is root, because that is used in the install script).
-# If the prefix specifies a directory that is owned by root, a compromise of
-# the Exim account does not permit arbitrary alternate configurations to be
-# used. The prefix can be more restrictive than just a directory (the second
-# example).
+# file. When this is used by root, root privilege is retained by the binary
+# (for any other caller including the Exim user, it is dropped). You can
+# restrict the location of alternate configurations by defining a prefix below.
+# Any file used with -C must then start with this prefix (except that /dev/null
+# is also permitted if the caller is root, because that is used in the install
+# script). If the prefix specifies a directory that is owned by root, a
+# compromise of the Exim account does not permit arbitrary alternate
+# configurations to be used. The prefix can be more restrictive than just a
+# directory (the second example).

 
 # ALT_CONFIG_PREFIX=/some/directory/
 # ALT_CONFIG_PREFIX=/some/directory/exim.conf-
 
 
 #------------------------------------------------------------------------------
 
 # ALT_CONFIG_PREFIX=/some/directory/
 # ALT_CONFIG_PREFIX=/some/directory/exim.conf-
 
 
 #------------------------------------------------------------------------------

-# If you uncomment the following line, only root may use the -C or -D options
-# without losing root privilege. The -C option specifies an alternate runtime
-# configuration file, and the -D option changes macro values in the runtime
-# configuration. Uncommenting this line restricts what can be done with these
-# options. A call to receive a message (either one-off or via a daemon) cannot
-# successfully continue to deliver it, because the re-exec of Exim to regain
-# root privilege will fail, owing to the use of -C or -D by the Exim user.
-# However, you can still use -C for testing (as root) if you do separate Exim
-# calls for receiving a message and subsequently delivering it.
+# When a user other than root uses the -C option to override the configuration
+# file (including the Exim user when re-executing Exim to regain root
+# privileges for local message delivery), this will normally cause Exim to
+# drop root privileges. The TRUSTED_CONFIG_LIST option, specifies a file which
+# contains a list of trusted configuration filenames, one per line. If the -C
+# option is used by the Exim user or by the user specified in the
+# CONFIGURE_OWNER setting, to specify a configuration file which is listed in
+# the TRUSTED_CONFIG_LIST file, then root privileges are not dropped by Exim.

 
 

-# ALT_CONFIG_ROOT_ONLY=yes
+# TRUSTED_CONFIG_LIST=/usr/exim/trusted_configs

 
 
 #------------------------------------------------------------------------------
 
 
 #------------------------------------------------------------------------------


@@ -455,6 +518,31 @@ FIXED_NEVER_USERS=root
 # DISABLE_D_OPTION=yes
 
 
 # DISABLE_D_OPTION=yes
 
 

+#------------------------------------------------------------------------------
+# By contrast, you might be maintaining a system which relies upon the ability
+# to override values with -D and assumes that these will be passed through to
+# the delivery processes.  As of Exim 4.73, this is no longer the case by
+# default.  Going forward, we strongly recommend that you use a shim Exim
+# configuration file owned by root stored under TRUSTED_CONFIG_LIST.
+# That shim can set macros before .include'ing your main configuration file.
+#
+# As a strictly transient measure to ease migration to 4.73, the
+# WHITELIST_D_MACROS value definies a colon-separated list of macro-names
+# which are permitted to be overriden from the command-line which will be
+# honoured by the Exim user.  So these are macros that can persist to delivery
+# time.
+# Examples might be -DTLS or -DSPOOL=/some/dir.  The values on the
+# command-line are filtered to only permit: [A-Za-z0-9_/.-]*
+#
+# This option is highly likely to be removed in a future release.  It exists
+# only to make 4.73 as easy as possible to migrate to.  If you use it, we
+# encourage you to schedule time to rework your configuration to not depend
+# upon it.  Most people should not need to use this.
+#
+# By default, no macros are whitelisted for -D usage.
+
+# WHITELIST_D_MACROS=TLS:SPOOL
+

 #------------------------------------------------------------------------------
 # Exim has support for the AUTH (authentication) extension of the SMTP
 # protocol, as defined by RFC 2554. If you don't know what SMTP authentication
 #------------------------------------------------------------------------------
 # Exim has support for the AUTH (authentication) extension of the SMTP
 # protocol, as defined by RFC 2554. If you don't know what SMTP authentication


@@ -466,6 +554,7 @@ FIXED_NEVER_USERS=root
 
 # AUTH_CRAM_MD5=yes
 # AUTH_CYRUS_SASL=yes
 
 # AUTH_CRAM_MD5=yes
 # AUTH_CYRUS_SASL=yes

+# AUTH_DOVECOT=yes

 # AUTH_PLAINTEXT=yes
 # AUTH_SPA=yes
 
 # AUTH_PLAINTEXT=yes
 # AUTH_SPA=yes
 


@@ -526,7 +615,7 @@ HEADERS_CHARSET="ISO-8859-1"
 # configuration of an authenticator for use with SMTP AUTH.) At least one
 # operating system has an extended function called crypt16(), which uses up to
 # 16 characters of a password (the normal crypt() uses only the first 8). Exim
 # configuration of an authenticator for use with SMTP AUTH.) At least one
 # operating system has an extended function called crypt16(), which uses up to
 # 16 characters of a password (the normal crypt() uses only the first 8). Exim

-# supports the use of crypt16() as well as crypt().
+# supports the use of crypt16() as well as crypt() but note the warning below.

 
 # You can always indicate a crypt16-encrypted password by preceding it with
 # "{crypt16}". If you want the default handling (without any preceding
 
 # You can always indicate a crypt16-encrypted password by preceding it with
 # "{crypt16}". If you want the default handling (without any preceding


@@ -538,10 +627,23 @@ HEADERS_CHARSET="ISO-8859-1"
 # an encrypted password with "{crypt}". For more details, see the description
 # of the "crypteq" condition in the manual chapter on string expansions.
 
 # an encrypted password with "{crypt}". For more details, see the description
 # of the "crypteq" condition in the manual chapter on string expansions.
 

-# Since most operating systems do not include a crypt16() function (yet?), Exim
-# has one of its own, which it uses unless HAVE_CRYPT16 is defined. Normally,
-# that will be set in an OS-specific Makefile for the OS that have such a
-# function, so you should not need to bother with it.
+# Some operating systems do not include a crypt16() function, so Exim has one
+# of its own, which it uses unless HAVE_CRYPT16 is defined. Normally, that will
+# be set in an OS-specific Makefile for the OS that have such a function, so
+# you should not need to bother with it.
+
+# *** WARNING *** WARNING *** WARNING *** WARNING *** WARNING ***
+# It turns out that the above is not entirely accurate. As well as crypt16()
+# there is a function called bigcrypt() that some operating systems have. This
+# may or may not use the same algorithm, and both of them may be different to
+# Exim's built-in crypt16() that is used unless HAVE_CRYPT16 is defined.
+#
+# However, since there is now a move away from the traditional crypt()
+# functions towards using SHA1 and other algorithms, tidying up this area of
+# Exim is seen as very low priority. In practice, if you need to, you can
+# define DEFAULT_CRYPT to the name of any function that has the same interface
+# as the traditional crypt() function.
+# *** WARNING *** WARNING *** WARNING *** WARNING *** WARNING ***

 
 
 #------------------------------------------------------------------------------
 
 
 #------------------------------------------------------------------------------


@@ -689,6 +791,16 @@ ZCAT_COMMAND=/usr/bin/zcat
 # EXIM_PERL=perl.o
 
 
 # EXIM_PERL=perl.o
 
 

+#------------------------------------------------------------------------------
+# Support for dynamically-loaded string expansion functions via ${dlfunc. If
+# you are using gcc the dynamically-loaded object must be compiled with the
+# -shared option, and you will need to add -export-dynamic to EXTRALIBS so
+# that the local_scan API is made available by the linker. You may also need
+# to add -ldl to EXTRALIBS so that dlopen() is available to Exim.
+
+# EXPAND_DLFUNC=yes
+
+

 #------------------------------------------------------------------------------
 # Exim has support for PAM (Pluggable Authentication Modules), a facility
 # which is available in the latest releases of Solaris and in some GNU/Linux
 #------------------------------------------------------------------------------
 # Exim has support for PAM (Pluggable Authentication Modules), a facility
 # which is available in the latest releases of Solaris and in some GNU/Linux


@@ -713,17 +825,24 @@ ZCAT_COMMAND=/usr/bin/zcat
 
 # If you have set RADIUS_CONFIG_FILE, you should also set one of these to
 # indicate which RADIUS library is used:
 
 # If you have set RADIUS_CONFIG_FILE, you should also set one of these to
 # indicate which RADIUS library is used:

-#
-# RADIUSCLIENT is the radiusclient library; you probably need to add
-#   -libradiusclient to EXTRALIBS
-#
-# RADLIB is the Radius library that comes with FreeBSD (the header file is
-#   called radlib.h); you probably need to add -lradius to EXTRALIBS

 
 # RADIUS_LIB_TYPE=RADIUSCLIENT
 
 # RADIUS_LIB_TYPE=RADIUSCLIENT

+# RADIUS_LIB_TYPE=RADIUSCLIENTNEW

 # RADIUS_LIB_TYPE=RADLIB
 
 # RADIUS_LIB_TYPE=RADLIB
 

-# If you don't set one of these, Exim assumes the radiusclient library.
+# RADIUSCLIENT is the radiusclient library; you probably need to add
+#   -lradiusclient to EXTRALIBS.
+#
+# The API for the radiusclient library was changed at release 0.4.0.
+# Unfortunately, the header file does not define a version number that clients
+# can use to support both the old and new APIs. If you are using version 0.4.0
+# or later of the radiusclient library, you should use RADIUSCLIENTNEW.
+#
+# RADLIB is the Radius library that comes with FreeBSD (the header file is
+#   called radlib.h); you probably need to add -lradius to EXTRALIBS.
+#
+# If you do not set RADIUS_LIB_TYPE, Exim assumes the radiusclient library,
+# using the original API.

 
 
 #------------------------------------------------------------------------------
 
 
 #------------------------------------------------------------------------------


@@ -776,6 +895,13 @@ ZCAT_COMMAND=/usr/bin/zcat
 #
 # but of course there may need to be other things in CFLAGS and EXTRALIBS_EXIM
 # as well.
 #
 # but of course there may need to be other things in CFLAGS and EXTRALIBS_EXIM
 # as well.

+#
+# To use a name other than exim in the tcpwrappers config file,
+# e.g. if you're running multiple daemons with different access lists,
+# or multiple MTAs with the same access list, define
+# TCP_WRAPPERS_DAEMON_NAME accordingly
+#
+# TCP_WRAPPERS_DAEMON_NAME="exim"

 
 
 #------------------------------------------------------------------------------
 
 
 #------------------------------------------------------------------------------


@@ -819,6 +945,10 @@ SYSTEM_ALIASES_FILE=/etc/aliases
 
 # USE_READLINE=yes
 
 
 # USE_READLINE=yes
 

+# You may need to add -ldl to EXTRALIBS when you set USE_READLINE=yes.
+# Note that this option adds to the size of the Exim binary, because the
+# dynamic loading library is not otherwise included.
+

 
 
 ###############################################################################
 
 
 ###############################################################################


@@ -842,8 +972,10 @@ SYSTEM_ALIASES_FILE=/etc/aliases
 
 # CHOWN_COMMAND=/usr/bin/chown
 # CHGRP_COMMAND=/usr/bin/chgrp
 
 # CHOWN_COMMAND=/usr/bin/chown
 # CHGRP_COMMAND=/usr/bin/chgrp

+# CHMOD_COMMAND=/usr/bin/chmod

 # MV_COMMAND=/bin/mv
 # RM_COMMAND=/bin/rm
 # MV_COMMAND=/bin/mv
 # RM_COMMAND=/bin/rm

+# TOUCH_COMMAND=/usr/bin/touch

 # PERL_COMMAND=/usr/bin/perl
 
 
 # PERL_COMMAND=/usr/bin/perl
 
 


@@ -1073,4 +1205,20 @@ TMPDIR="/tmp"
 
 # SUPPORT_MOVE_FROZEN_MESSAGES=yes
 
 
 # SUPPORT_MOVE_FROZEN_MESSAGES=yes
 

+
+#------------------------------------------------------------------------------
+# Disabling the use of fsync(): DO NOT UNCOMMENT THE FOLLOWING LINE unless you
+# really, really, really know what you are doing. And even then, think again.
+# You should never uncomment this when compiling a binary for distribution.
+# Use it only when compiling Exim for your own use.
+#
+# Uncommenting this line enables the use of a runtime option called
+# disable_fsync, which can be used to stop Exim using fsync() to ensure that
+# files are written to disc before proceeding. When this is disabled, crashes
+# and hardware problems such as power outages can cause data to be lost. This
+# feature should only be used in very exceptional circumstances. YOU HAVE BEEN
+# WARNED.
+
+# ENABLE_DISABLE_FSYNC=yes
+

 # End of EDITME for Exim 4.
 # End of EDITME for Exim 4.