The Courier package contains a Mail Transport Agent (MTA). This is useful for sending email to other users of your host machine. It can also be configured to be a central mail server for your domain or a mail relay agent. The Courier packages also includes a web-based email interface, IMAP, IMAP-SSL, POP3, and POP3-SSL.
Download (HTTP): http://prdownloads.sourceforge.net/courier/courier-0.47.tar.bz2
Download MD5 sum: 639bb3b236914e3b86f287ce3f55264e
Download size: 4.3 MB
Estimated disk space required: 102 MB
Estimated build time: 2.62 SBU
Courier's tarball must be extacted as an unprivileged user or the configure script will fail.
Before you compile the program, you need to create the courier user and group that is expected to be in place when the install script executes. As the root user, add the courier user and group with the following commands:
groupadd courier && useradd -c 'Courier Mail Server' -d /dev/null \ -g courier -s /bin/false courier
The install script also expects a bin user. If you already have a user named bin, this step can be safely ignored.
useradd -c 'bin' -d /dev/null -g bin -u 1 bin
Courierfilter requires the directory /var/run/courier to store all the Courier pid and lockfiles. /var/lock/subsys also must exist for the master lock file for Courier. Issue the following commands to create these directories:
install -d /var/run/courier -o courier -g courier -m755 && install -d /var/lock/subsys -o root -g root -m755
Build Courier as an unprivileged user with the following commands:
./configure --prefix=/usr --libexecdir=/usr/lib/courier \ --datadir=/usr/share/courier --sysconfdir=/etc/courier \ --localstatedir=/var/lib/courier --with-piddir=/var/run/courier \ --with-paranoid-smtpext --disable-autorenamesent \ --enable-workarounds-for-imap-client-bugs --with-db=gdbm && make
Once again, become the root user and install Courier with the following commands:
make install && make install-configure
--libexecdir=/usr/lib/courier: Specifies the directory which contains programs and libraries that cannot be directly executed from the command-line.
--datadir=/usr/share/courier: Specifies the directory where miscellaneous shell scripts, Perl scripts, and data files will be installed.
--localstatedir=/var/spool/courier: Specifies the directory that will hold the mail queue, and other temporary data.
--with-piddir=/var/run/courier: Specifies the directory where Courier's PID files are stored when Courier is active.
--with-paranoid-smtpext: Be paranoid when negotiating Courier-specific ESMTP extensions with remote servers. The Courier mail server defines and implements certain experimental ESMTP extensions: XVERP and XEXDATA. Problems may result in the event that someone else uses the same name to implement some other extension. If this option is specified, Courier's ESMTP server will also advertise a dummy ESMTP capability called XCOURIEREXTENSIONS, and will not recognize any Courier-specific extensions unless the remote mail server also advertises this dummy ESMTP capability.
--disable-autorenamesent: Do not rename the Sent folder every month. This option can also be controlled by the SQWEBMAIL_AUTORENAMESENT environment variable.
--enable-workarounds-for-imap-client-bugs: There are several confirmed bugs in some IMAP clients that do not properly implement the IMAP4rev1 protocol. This option enables some workarounds for those buggy IMAP clients. NOTE: make check will fail if this option is used. You should first configure without this option, and if all post-configuration tests succeed, rerun configure with this option and recompile.
--with-db=gdbm: Courier requires either the GDBM or the DB database library. GDBM is used if both are present. This option forces the selection of GDBM as courier is currently broken when used with DB.
--with-ispell=/usr/bin/aspell: Courier's webmail server can use spell checking, if configure finds ispell or if you explicitly set the location of aspell.
--enable-mimetypes=[location of mime.types file]: Use this switch if you receive an error saying that the mime.types file could not be found.
While still as root, you will need to create the following files with the contents specified.
cat > /etc/courier/defaultdomain << "EOF" [yourdomain] EOF
cat > /etc/courier/me << "EOF" [servername.yourdomain] EOF
cat > /etc/courier/locals << "EOF" localhost [yourdomain] EOF
cat > /etc/courier/esmtpacceptmailfor.dir/system << "EOF" localhost [yourdomain] EOF
You will also need to edit the /etc/courier/aliases/system file and change the following entry.
postmaster: [your administrator email]
If you want to deny access from some hosts from sending mail, you will need to edit the /etc/courier/smtpaccess/default file.
If you wish to host mail for non local domains including virtual domains, you must add them to /etc/courier/hosteddomains. This file should exist whether you need a hosted domain list or not:
After the above steps are completed you will need to run the following commands:
makesmtpaccess && makehosteddomains && makealiases
For each user, you will need to create a Maildir directory:
cd /home/[username] && maildirmake Maildir && chown [username].[username] Maildir -R
If you wish to use SSL with Courier, you should obtain certificates and store them in /usr/share/courier. You can optionally create self-signed, test certificates with the following commands:
mkesmtpdcert && mkimapdcert && mkpop3dcert
All of Courier's configuration files reside in the directory /etc/courier/. For each service SMTP, POP3 and IMAP, you will have a standard config file, and an SSL config file. For each service that you wish to utilize, you will need to edit the configuration file, and change the [DAEMON]START variable from 'NO' to 'YES'. For example, to use SMTP with SSL, you'll need to edit /etc/courier/esmtpd-ssl and change the value of 'ESMTPDSSLSTART' to 'YES'. Make the same change for each service configuration that you wish to use with Courier.
If you wish to use LDAP, an LDAP configuration file should be created:
echo "LDAPALIASDSTART=YES" > /etc/courier/ldapaliasd
Similarly, if you wish to use webmail, you should create the webmail configuration file:
echo "WEBMAILDSTART=YES" > /etc/courier/webmaild
You will also need to copy the webmail file from /usr/lib/courier/courier/webmail to the cgi-bin directory of your Apache server.
cp -a /usr/lib/courier/courier/webmail/webmail /srv/www/cgi-bin
You will then need to copy the images to a directory under your htdocs directory of your Apache server. The directory needs to be named webmail or you need to specify it during the configure phase with --enable-imageurl=[URL].
cp -a /usr/share/courier/sqwebmail/images /srv/www/htdocs/webmail
If you wish to utilze the webadmin utility, you will need to copy the webadmin file from /usr/lib/courier/courier/webmail to your cgi-bin directory of your Apache server.
cp -a /usr/lib/courier/courier/webmail/webadmin /srv/www/cgi-bin
You also need to put the password into the file /etc/courier/webadmin/password:
cat > /etc/courier/webadmin/password << "EOF" [password] EOF
If you are not using SSL on your Apache server, you will also need to add /etc/courier/webadmin/unsecureok, so you will be able to use your web based administration tool.
If you use Linux-PAM on your system, you will need to create the PAM configuration files:
cat > /etc/pam.d/esmtp << "EOF" # Begin /etc/pam.d/esmtp auth required pam_unix.so try_first_pass account required pam_unix.so session required pam_unix.so # End /etc/pam.d/esmtp EOF cat > /etc/pam.d/pop3 << "EOF" # Begin /etc/pam.d/pop3 auth required pam_unix.so try_first_pass account required pam_unix.so session required pam_unix.so # End /etc/pam.d/pop3 EOF cat > /etc/pam.d/imap << "EOF" # Begin /etc/pam.d/imap auth required pam_unix.so try_first_pass account required pam_unix.so session required pam_unix.so # End /etc/pam.d/imap EOF cat > /etc/pam.d/webmail << "EOF" # Begin /etc/pam.d/webmail auth required pam_unix.so try_first_pass account required pam_unix.so session required pam_unix.so # End /etc/pam.d/webmail EOF
Finally, if you wish to start the Courier server at boot, install the /etc/rc.d/init.d/courier bootscript included in the blfs-bootscripts-6.0 package.
These instructions will configure Courier to lookup virtual users in a MySQL database. Begin by making the following changes to /etc/courier/authmysqlrc:
MYSQL_SERVER localhost MYSQL_USERNAME courier MYSQL_PASSWORD [your choice] MYSQL_SOCKET /var/run/mysql/mysql.sock MYSQL_PORT 3306 MYSQL_DATABASE courier_mail MYSQL_USER_TABLE users MYSQL_CLEAR_PWFIELD clear DEFAULT DOMAIN [your domain] MYSQL_QUOTA_FIELD quota
Connect to MySQL:
Create the courier_mail database and setup the users table:
CREATE DATABASE courier_mail; USE courier_mail CREATE TABLE users ( id char(128) DEFAULT '' NOT NULL, crypt char(128) DEFAULT '' NOT NULL, clear char(128) DEFAULT '' NOT NULL, name char(128) DEFAULT '' NOT NULL, uid int(10) unsigned DEFAULT '65534' NOT NULL, gid int(10) unsigned DEFAULT '65534' NOT NULL, home char(255) DEFAULT '' NOT NULL, quota char(255) DEFAULT '' NOT NULL, KEY id (id(128)) );
Grant all priveledges to the courier user created earlier:
GRANT ALL PRIVILEGES ON *.* TO courier@localhost \ IDENTIFIED BY '[password]' WITH GRANT OPTION; QUIT
Create a virtual mailman user and group:
groupadd -g 9000 vmailman && useradd -c 'Virtual Mailman' -g vmailman -m -k /dev/null -u 9000 vmailman
Create a mail directory for a new virtual user:
cd /home/vmailman && mkdir [virtual_user] && cd [virtual_user] && maildirmake Maildir && chown vmailman.vmailman Maildir -R
Now, connect the the MySQL database as the courier user:
mysql -u courier -p
To add the virtual user you need to enter at least one version of the password either clear text or encrypted.
Add the first virtual user with the following commands:
USE courier_mail INSERT INTO users VALUES ( '[virtual_users]@[domain.com], '[encrypted password or blank]', '[clear text password or blank]', '[User's Name]', 9000, 9000, '[location of Maildir]', '[Quota in Bytes'] ); QUIT
INSERT INTO users VALUES ( 'email@example.com', '', 'password', 'BLFS User', 9000, 9000, '/home/vmailman/blfsuser', '' );
removes a message from the mail queue.
is an administrative command used to control the Courier scheduling engine.
sends email messages by fax.
starts and stops all mail filters installed by filterctl.
supports mail address aliasing using an LDAP directory.
captures error messages from other Courier applications and forwards them to the system logger.
sets up, maintains, and manages mailing lists.
is a sample filter written in Perl.
is a Courier POP3 server.
reads the POP3 userid and password and passes them to the authentication modules.
accepts incoming network connections, and runs other Courier programs after establishing each network connection.
is used by applications to encrypt a network connection using SSL/TLS.
is a compatibility module that reads forwarding instructions in $HOME/.forward.
is a threaded filter that tries to block junk E-mail by attempting to detect multiple copies of the same message, which are rejected.
is a control script for courieresmtpd.
is a control script for courieresmtpd, but adds message submission port 587 for the MSA protocol.
installs or uninstalls global mail filters.
is the Courier-IMAP server.
is a helper utility for locking mailbox files.
is a MIME-aware autoresponder utility.
manages access control lists.
modifies Courier-IMAP compatible maildir message keywords.
creates maildirs, and maildir folders.
is a replacement local mail delivery agent that includes a mail filtering language.
displays a list of all messages that have not been delivered yet.
builds a list of domains to accept mail for, from the /etc/courier/esmtpacceptmailfor.dir directory.
builds an alias database from one or more plain text source files.
is a utility to create GDBM or DB files from plain text files.
rebuilds the contents of the hosteddomains database from the contents of /tools/etc/courier/hosteddomains.
creates MIME-formatted messages from one or more files.
builds a list of %-relayed domains from the percentrelay.dir directory.
builds ESMTP server access files from the /etc/courier/smtpaccess directory.
builds ESMTP server access files from the /etc/courier/smtpaccess directory. This esmtp list is for the MSA protocol.
builds a user/password db from the contents of /tools/etc/courier/userdb.
signs, encrypts, or decrypts MIME-formatted email messages using GnuPG.
creates a secure SMTP test certificate.
creates a secure IMAP test certificate.
creates a secure POP3 test certificate.
is a wrapper script for couriertcpd to start and stop the POP3 service.
is a wrapper script for couriertcpd to start and stop the POP3 over SSL service.
prepends legacy mbox headers to mail messages.
reads a message on standard input, reformats it in some way, and writes the message to standard output.
is a utility for reformatting MIME messages.
reads an email message and delivers the message to its recipients.
submits messages to Courier for processing.
lists the names and IP addresses of mail relays that receive mail for the domain.
is a script to individually manipulate entries in /tools/etc/courier/userdb.
reads a single line of text on standard input, encrypts it, and prints the encrypted result to standard output.
Last updated on 2005-03-14 04:10:36 -0700