Remove comment lines from the output file. [Default]
Write output to file instead of /var/lib/exim4/config.autogenerated.
Read input from directory instead of /etc/exim4.
generates the main configuration files
by merging the data in the template file
or the ones in the
directory tree respectively and
to the output file
If dc_use_split_config in /etc/exim4/update-exim4.conf.conf specifies a split
processes the /etc/exim4/conf.d subdirectories in the order main, acl,
router, transport, retry, rewrite and auth. Within each directory it takes
files in lexical sort order by file name. It concatenates all these files
and makes the debconf replacement described below.
If you are not using split configuration
(if this file exists) and /etc/exim4/exim4.conf.template (in this order) and
makes the debconf replacement described below.
In either case, before outputting the result
generates a number of exim configuration macros from the contents of
dc_something from /etc/exim4/update-exim4.conf.conf and inserts them
into the configuration right after the definition of the exim
configuration macro UPEX4CmacrosUPEX4C (which is only used as
placeholder for this case). The macro definitions are bracketed
with .ifdef clauses to allow the local admin to override the values with
makes no other changes to the configuration.
This makes it very simple to make small changes to the configuration and
still have the benefits of debconf.
On the other hand if you don't want to manage exim4.conf with debconf
install your own handcrafted version as /etc/exim4/exim4.conf.
Exim will use this file if it exists and ignore the autogenerated one.
Additionally you might want to set
in /etc/exim4/update-exim4.conf.conf to stop debconf from asking you questions about exim4.
exits silently and does nothing if /etc/exim4/exim4.conf exists and -o
was not used to direct the output to a different file than
will only use files in the conf.d directory that have a filename which
consists only of letters, numbers, underscores and hyphens
([:alnum:]_-), similar to
will use /etc/exim4/conf.d/foo/bar.rul instead of
/etc/exim4/conf.d/foo/bar if the .rul file exists. This is meant to be
helpful for easy interaction with packages extending Exim.
If the new configuration will be written to
will check the validity of the freshly generated configuration. If
the new file is detected as invalid, update-exim4.conf leaves the old
/var/lib/exim4/config.autogenerated untouched and exits with an error.
However, there are still possible invalidities that can only be
detected at run time. This most notably applies to errors in
expressions that are expanded at run time.
If the new configuration will be written to some other file, no
validity checking occurs and that file will always be overwritten.
You want to be able to check exim's queue as normal user: Generate a new
file, e.g. /etc/exim4/conf.d/main/40_local_mailq, containing only the line
queue_list_requires_admin = false
changes the file permissions of the output file to the value of the environment
variable CFILEMODE. If CFILEMODE is neither set in
/etc/exim4/update-exim4.conf.conf nor in the environment it defaults to 0644.
Change this to 0640 if you are keeping sensitive information (LDAP credentials
et. al.) in there.
All lists given in configuration variables are semicolon-separated. In
the past, they used to be colon separated. This was changed to
semicolon separation to make specification of IPv6 addresses easier.
Backwards compatibility is preserved, so that old configurations using
colons as separators do still work. Colons are deprecated and might
stop working in a later release. If you need to specifiy a single IPv6
address in a field that is defined as a list of host names or IP
addresses, please prefix "<;" to explicitly specify the list separator
as a semicolon. Otherwise, the code cannot tell an IP address from a
colon-separated list of strange host names.
Using lookups like "dsearch;something" in update-exim4.conf.conf has
never been supported and does no longer work! If you need this, please
convert to directly setting the appropriate macros.
evaluates these patterns in
The octal file mode of the generated file.
The main configuration type. One of "internet", "smarthost",
"satellite", "local", "exim3manual" or "none".
Sets macro DC_eximconfig_configtype.
Boolean option that controls whether the local mailname in the headers of
outgoing mail should be hidden. (Only effective for "smarthost" and
"satellite". Sets macro HIDE_MAILNAME.
Internal use only Boolean option that is set by the maintainer scripts
after adding the contents of /etc/mailname to the dc_other_hostnames
list. This is a transition helper since it wouldn't otherwise be
possible to see whether that domain name has been removed from
dc_other_hostnames on purpose. This is not used by update-exim4.conf,
and no macro is set.
Boolean option that controls whether
strips the comments from the target configuration file (default) or
leaves them in. This can be overridden by the command line options
--keepcomments and --removecomments. The value is not written to an
name of the default transport for local mail delivery. Defaults to mail_spool
if unset, use maildir_home for delivery to ~/Maildir/. Sets macro
List of IP addresses the Exim daemon should listen on. If this is left
empty, Exim listens on all interfaces. Sets macro
MAIN_LOCAL_INTERFACES only if there is a non-empty value.
Boolean option to activate some option to minimize DNS lookups, if set to
"true" a macro DC_minimaldns is defined. If true, the macro
DC_minimaldns is set to 1, and the macro
MAIN_HARDCODE_PRIMARY_HOSTNAME is set to the appropriately
post-processes output of hostname --fqdn.
is used to build the local_domains list, together with "localhost".
This is the list of domains for which this machine should
consider itself the final destination. The local_domains list ends up
in the macro MAIN_LOCAL_DOMAINS.
For "smarthost" and "satellite" it is possible to hide the local
mailname in the headers of outgoing mail and replace it with this value
instead, using rewriting. Sets macro DCreadhost.
is a list of domains for which we accept mail from anywhere on the
Internet but which are not delivered locally, e.g. because this machine
serves as secondary MX for these domains. Sets MAIN_RELAY_TO_DOMAINS.
A list of machines for which we serve as smarthost. Please note that
127.0.0.1 and ::1 are always permitted to relay since /usr/lib/sendmail
is available anyway and relay control doesn't make sense here. Sets
List of hosts to which all outgoing mail is passed to and that takes care
of delivering it. Each of the hosts is tried, in the order specified
(See exim specification, chapter 20.5). All deliveries go out to TCP
port 25 unless a different port is specified after the host name,
separated from the host name by two colons. Colons in IPv6 addresses need
to be doubled. If a port number follows, IP addresses may be enclosed in
brackets, which might be the only possibility to specify delivery to an
IPv6 address and a different port. Examples:
deliver to host looked up on DNS, tcp/25
deliver to host looked up on DNS, tcp/587
deliver to IPv4 host, tcp/25
deliver to IPv4 host, tcp/587
deliver to IPv4 host, tcp/587
deliver to IPv6 host, tcp/25
deliver to IPv6 host, tcp/587
This is used as value of the DCsmarthost macro.
Boolean option that controls whether
uses /etc/exim4/exim4.conf.template ("false") or the multiple files
below /etc/exim4/conf.d ("true") as input. This does not set any
The macro MAIN_PACKAGE_VERSION is set to Debian's Version number of
the package being installed for convenient inclusion in the
If you are running exim as daemon (as it is in the default setup of the
Debian packages) you should not invoke
directly when exim is running. For SMTP receiving or queue running,
exim forks, and the new processes would use the new configuration file,
while the original main exim daemon would still use the old configuration
file. You should use
invoke-rc.d exim4 restart
This manual page needs a major re-work. If somebody knows better groff
than us and has more experience in writing manual pages, any patches
would be greatly appreciated.
Exim's main configuration file
Optional manually managed Exim main configuration file. Takes precedence over
debconf managed one if it exists.
Configuration file being written by exim4-config maintainer scripts,
which may be hand-edited, and is read as input by update-exim4.conf.
/usr/share/doc/exim4-base/ and for general notes and details about interaction