Debian Tutorials

Debian Tutorials


Step by step tutorials showing you how to install and configure various applications and services on Debian based Linux distros.

April 2021
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Installing Courier POP3 and IMAP services with MySql backend

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This tutorial assumes you already have Postfix installed with MySql backend as described in this tutorial: Installing Postfix with MySql backend and TLS

1. Install required packages

apt-get install courier-authdaemon courier-authlib-mysql courier-pop courier-pop-ssl courier-imap courier-imap-ssl

2. Make the auth daemon support MySql virtual users (pico /etc/courier/authdaemonrc)

authmodulelist="authmysql"

3. Configure courier to use MySql backend (pico /etc/courier/authmysqlrc)

MYSQL_SERVER {mysql_host}
MYSQL_USERNAME {mysql_username}
MYSQL_PASSWORD {mysql_password}
MYSQL_PORT 0
MYSQL_DATABASE {mysql_database}
MYSQL_USER_TABLE users
MYSQL_CRYPT_PWFIELD password
MYSQL_UID_FIELD 5000
MYSQL_GID_FIELD 5000
MYSQL_LOGIN_FIELD email
MYSQL_HOME_FIELD "/home/vmail"
MYSQL_MAILDIR_FIELD CONCAT(SUBSTRING_INDEX(email,'@',-1),'/',SUBSTRING_INDEX(email,'@',1),'/')
MYSQL_QUOTA_FIELD quota

4. Restart affected daemons

/etc/init.d/courier-authdaemon restart
/etc/init.d/courier-imap restart
/etc/init.d/courier-imap-ssl restart
/etc/init.d/courier-pop restart
/etc/init.d/courier-pop-ssl restart

You can now connect to your server on port 110 for pop3, 995 for pop3s, 143 for imap and 993 for imaps.

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