Exim の概要

Exim パッケージは、メール転送エージェント (mail transfer agent) を提供します。 ケンブリッジ大学にて開発され、GNU Public License により公開されています。

本パッケージは LFS-11.1 において正しくビルドでき動作することが確認されています。



  • Additional formats of the documentation (text-based docs are shipped with the sources) can be downloaded by following the links shown at http://exim.org/docs.html.

Exim の依存パッケージ


libnsl-2.0.0, PCRE-8.45


TDB (LFS でビルドしている GDBM の代用), Cyrus SASL-2.1.27, libidn-1.38, Linux-PAM-1.5.2, MariaDB-10.6.4 or MySQL, OpenLDAP-2.5.8, GnuTLS-3.7.2, PostgreSQL-13.4, SQLite-3.36.0, X ウィンドウシステム, Heimdal GSSAPI, OpenDMARC

ユーザー情報: https://wiki.linuxfromscratch.org/blfs/wiki/exim

Exim のインストール

Exim をビルドするにあたっては、root ユーザーになって exim というユーザーおよびグループを作成する必要があります。 これは exim デーモンを起動するものになります。

groupadd -g 31 exim &&
useradd -d /dev/null -c "Exim Daemon" -g exim -s /bin/false -u 31 exim

以下のコマンドを実行して Exim をビルドします。

sed -e 's,^BIN_DIR.*$,BIN_DIRECTORY=/usr/sbin,'    \
    -e 's,^CONF.*$,CONFIGURE_FILE=/etc/exim.conf,' \
    -e 's,^EXIM_USER.*$,EXIM_USER=exim,'           \
    -e '/# SUPPORT_TLS=yes/s,^#,,'                   \
    -e '/# USE_OPENSSL/s,^#,,'                       \
    -e 's,^EXIM_MONITOR,#EXIM_MONITOR,' src/EDITME > Local/Makefile &&

printf "USE_GDBM = yes\nDBMLIB = -lgdbm\n" >> Local/Makefile &&


root ユーザーになって以下を実行します。

make install                                    &&
install -v -m644 doc/exim.8 /usr/share/man/man8 &&

install -v -d -m755    /usr/share/doc/exim-4.94.2 &&
install -v -m644 doc/* /usr/share/doc/exim-4.94.2 &&

ln -sfv exim /usr/sbin/sendmail                 &&
install -v -d -m750 -o exim -g exim /var/spool/exim


sed -e ... > Local/Makefile: Most of Exim's configuration options are defined in Local/Makefile, which is created from the src/EDITME file. This command specifies the minimum set of options. Descriptions for the options are listed below.

printf ... > Local/Makefile: Setting those variables allows to use GDBM instead of the default Berkeley DB. Remove this command if you have installed Berkeley DB-5.3.28.

BIN_DIRECTORY=/usr/sbin: This installs all of Exim's binaries and scripts in /usr/sbin.

CONFIGURE_FILE=/etc/exim.conf: This installs Exim's main configuration file in /etc.

EXIM_USER=exim: This tells Exim that after the daemon no longer needs root privileges, the process hands off the daemon to the exim user.

SUPPORT_TLS=yes: This allows to support STARTTLS connections. If you use this option, you need to select whether OpenSSL or GnuTLS is used (see src/EDITME).

USE_OPENSSL_PC=openssl: This tells the build system to use OpenSSL, and to find the needed libraries with pkg-config.

#EXIM_MONITOR: This defers building the Exim monitor program, as it requires X Window System support, by commenting out the EXIM_MONITOR line in the Makefile. If you wish to build the monitor program, omit this sed command and issue the following command before building the package (modify Local/eximon.conf, if necessary): cp exim_monitor/EDITME Local/eximon.conf.

ln -sfv exim /usr/sbin/sendmail: Creates a link to sendmail for applications which need it. Exim will accept most Sendmail command-line options.

install -v -m750 -o exim -g exim /var/spool/exim: Since /var/spool is owned by root and this version of exim drops root privileges early, to run as user exim, it cannot create the /var/spool/exim directory. As a work around, it is created manually.

Adding Additional Functionality

To utilize some or all of the dependency packages, you'll need to modify Local/Makefile to include the appropriate directives and parameters to link additional libraries before you build Exim. Local/Makefile is heavily commented with instructions on how to do this. Listed below is additional information to help you link these dependency packages or add additional functionality.

If you wish to build and install the .info documentation, refer to http://exim.org/exim-html-4.94.2/doc/html/spec_html/ch04.html#SECTinsinfdoc.

If you wish to build in Exim's interfaces for calling virus and spam scanning software directly from access control lists, uncomment the WITH_CONTENT_SCAN=yes parameter and review the information found at http://exim.org/exim-html-4.94.2/doc/html/spec_html/ch45.html.

To use a backend database other than Berkeley DB, see the instructions at http://exim.org/exim-html-4.94.2/doc/html/spec_html/ch04.html#SECTdb.

For SSL functionality, see the instructions at http://exim.org/exim-html-4.94.2/doc/html/spec_html/ch04.html#SECTinctlsssl and http://exim.org/exim-html-4.94.2/doc/html/spec_html/ch42.html.

For tcpwrappers functionality, see the instructions at http://exim.org/exim-html-4.94.2/doc/html/spec_html/ch04.html#SECID27.

For information about adding authentication mechanisms to the build, see chapters 33—41 of http://exim.org/exim-html-4.94.2/doc/html/spec_html/index.html.

For information about linking Linux-PAM, refer to the instructions http://exim.org/exim-html-4.94.2/doc/html/spec_html/ch11.html#SECTexpcond.

For information about linking database engine libraries used for Exim name lookups, see the instructions at http://exim.org/exim-html-4.94.2/doc/html/spec_html/ch09.html.

If you wish to add Readline support to Exim when invoked in test expansion (-be) mode, see the information in the -be section of http://exim.org/exim-html-4.94.2/doc/html/spec_html/ch05.html#id2525974.

You may wish to modify the default configuration and send log files to syslog instead of the default /var/spool/exim/log directory. See the information at http://exim.org/exim-html-4.94.2/doc/html/spec_html/ch52.html.

A wealth of information can be also found at the Exim Wiki.

Exim の設定


/etc/exim.conf and /etc/aliases


Review the file /etc/exim.conf, and modify any settings to suit your needs. Note that the default configuration assumes that the /var/mail directory is world writable, but has the sticky bit set. If you want to use the default configuration, issue as the root user:

chmod -v a+wt /var/mail

A default (nothing but comments) /etc/aliases file is installed during the package installation if this file did not exist on your system. Create the necessary aliases and start the Exim daemon using the following commands:

cat >> /etc/aliases << "EOF"
postmaster: root
/usr/sbin/exim -bd -q15m


To protect an existing /etc/aliases file, the command above appends these aliases to it. This file should be checked and duplicate aliases removed, if present.

The /usr/sbin/exim -bd -q15m command starts the Exim daemon with a 15 minute interval in processing the mail queue. Adjust this parameter to suit your desires.

Systemd Unit

To automatically start exim at boot, install the exim.service unit included in the blfs-systemd-units-20210819 package:

make install-exim


インストールプログラム: exicyclog, exigrep, exim, exim-4.94.2-2, exim_checkaccess, exim_dbmbuild, exim_dumpdb, exim_fixdb, exim_lock, exim_tidydb, eximstats, exinext, exipick, exiqgrep, exiqsumm, exiwhat, 任意ビルドとして eximon, eximon.bin, and sendmail (シンボリックリンク)
インストールライブラリ: なし
インストールディレクトリ: /usr/share/doc/exim-4.94.2, /var/spool/exim



Exim のログファイルを回します。


searches Exim log files


is a symlink to the exim-4.94.2-2 MTA daemon


is the Exim mail transport agent daemon


states whether a given recipient address from a given host is acceptable or not


creates and rebuilds Exim databases


writes the contents of Exim databases to the standard output


modifies data in Exim databases


locks a mailbox file


removes old records from Exim databases


generates mail statistics from Exim log files


queries remote host retry times


selects messages based on various criteria


is a utility for selective queue listing


produces a summary of the messages in the mail queue


queries running Exim processes


is a start-up shell script for eximon.bin used to set the required environment variables before running the program


is a monitor program which displays current information in an X window, and also contains a menu interface to Exim's command line administration options