This is what I have in defaults.inc.php on imap and smtp
// ----------------------------------
// IMAP
// ----------------------------------
// The mail host chosen to perform the log-in.
// Leave blank to show a textbox at login, give a list of hosts
// to display a pulldown menu or set one host as string.
// To use SSL/TLS connection, enter hostname with prefix ssl:// or tls://
// Supported replacement variables:
// %n - hostname ($_SERVER['SERVER_NAME'])
// %t - hostname without the first part
// %d - domain (http hostname $_SERVER['HTTP_HOST'] without the first part)
// %s - domain name after the '@' from e-mail address provided at login screen
// For example %n = mail.domain.tld, %t = domain.tld
// WARNING: After hostname change update of mail_host column in users table is
// required to match old user data records with the new host.
$config['default_host'] = 'ssl://mail.skjoldebrand.eu';
// TCP port used for IMAP connections
$config['default_port'] = 143;
// IMAP AUTH type (DIGEST-MD5, CRAM-MD5, LOGIN, PLAIN or null to use
// best server supported one)
$config['imap_auth_type'] = LOGIN;
// IMAP socket context options
// See http://php.net/manual/en/context.ssl.php
// The example below enables server certificate validation
//$config['imap_conn_options'] = array(
// 'ssl' => array(
// 'verify_peer' => true,
// 'verify_depth' => 3,
// 'cafile' => '/etc/postfix/smtpd.cert',
// ),
// );
$config['imap_conn_options'] = null;
// IMAP connection timeout, in seconds. Default: 0 (use default_socket_timeout)
$config['imap_timeout'] = 0;
// Optional IMAP authentication identifier to be used as authorization proxy
$config['imap_auth_cid'] = null;
// Optional IMAP authentication password to be used for imap_auth_cid
$config['imap_auth_pw'] = null;
// If you know your imap's folder delimiter, you can specify it here.
// Otherwise it will be determined automatically
$config['imap_delimiter'] = null;
// If IMAP server doesn't support NAMESPACE extension, but you're
// using shared folders or personal root folder is non-empty, you'll need to
// set these options. All can be strings or arrays of strings.
// Folders need to be ended with directory separator, e.g. "INBOX."
// (special directory "~" is an exception to this rule)
// These can be used also to overwrite server's namespaces
$config['imap_ns_personal'] = null;
$config['imap_ns_other'] = null;
$config['imap_ns_shared'] = null;
// By default IMAP capabilities are readed after connection to IMAP server
// In some cases, e.g. when using IMAP proxy, there's a need to refresh the list
// after login. Set to True if you've got this case.
$config['imap_force_caps'] = false;
// By default list of subscribed folders is determined using LIST-EXTENDED
// extension if available. Some servers (dovecot 1.x) returns wrong results
// for shared namespaces in this case. http://trac.roundcube.net/ticket/1486225
// Enable this option to force LSUB command usage instead.
// Deprecated: Use imap_disabled_caps = array('LIST-EXTENDED')
$config['imap_force_lsub'] = false;
// Some server configurations (e.g. Courier) doesn't list folders in all namespaces
// Enable this option to force listing of folders in all namespaces
$config['imap_force_ns'] = false;
// List of disabled imap extensions.
// Use if your IMAP server has broken implementation of some feature
// and you can't remove it from CAPABILITY string on server-side.
// For example UW-IMAP server has broken ESEARCH.
// Note: Because the list is cached, re-login is required after change.
$config['imap_disabled_caps'] = array();
// Log IMAP session identifers after each IMAP login.
// This is used to relate IMAP session with Roundcube user sessions
$config['imap_log_session'] = false;
// Type of IMAP indexes cache. Supported values: 'db', 'apc' and 'memcache'.
$config['imap_cache'] = null;
// Enables messages cache. Only 'db' cache is supported.
// This requires an IMAP server that supports QRESYNC and CONDSTORE
// extensions (RFC7162). See synchronize() in program/lib/Roundcube/rcube_imap_cache.php
// for further info, or if you experience syncing problems.
$config['messages_cache'] = false;
// Lifetime of IMAP indexes cache. Possible units: s, m, h, d, w
$config['imap_cache_ttl'] = '10d';
// Lifetime of messages cache. Possible units: s, m, h, d, w
$config['messages_cache_ttl'] = '10d';
// Maximum cached message size in kilobytes.
// Note: On MySQL this should be less than (max_allowed_packet - 30%)
$config['messages_cache_threshold'] = 50;
// ----------------------------------
// SMTP
// ----------------------------------
// SMTP server host (for sending mails).
// To use SSL/TLS connection, enter hostname with prefix ssl:// or tls://
// If left blank, the PHP mail() function is used
// Supported replacement variables:
// %h - user's IMAP hostname
// %n - hostname ($_SERVER['SERVER_NAME'])
// %t - hostname without the first part
// %d - domain (http hostname $_SERVER['HTTP_HOST'] without the first part)
// %z - IMAP domain (IMAP hostname without the first part)
// For example %n = mail.domain.tld, %t = domain.tld
$config['smtp_server'] = 'ssl://mail.skjoldebrand.eu';
// SMTP port (default is 25; use 587 for STARTTLS or 465 for the
// deprecated SSL over SMTP (aka SMTPS))
$config['smtp_port'] = 465;
// SMTP username (if required) if you use %u as the username Roundcube
// will use the current username for login
$config['smtp_user'] = '%u';
// SMTP password (if required) if you use %p as the password Roundcube
// will use the current user's password for login
$config['smtp_pass'] = '%p';
// SMTP AUTH type (DIGEST-MD5, CRAM-MD5, LOGIN, PLAIN or empty to use
// best server supported one)
$config['smtp_auth_type'] = 'LOGIN';
// Optional SMTP authentication identifier to be used as authorization proxy
$config['smtp_auth_cid'] = null;
// Optional SMTP authentication password to be used for smtp_auth_cid
$config['smtp_auth_pw'] = null;
// SMTP HELO host
// Hostname to give to the remote server for SMTP 'HELO' or 'EHLO' messages
// Leave this blank and you will get the server variable 'server_name' or
// localhost if that isn't defined.
$config['smtp_helo_host'] = 'mail.skjoldebrand.eu';
// SMTP connection timeout, in seconds. Default: 0 (use default_socket_timeout)
// Note: There's a known issue where using ssl connection with
// timeout > 0 causes connection errors (https://bugs.php.net/bug.php?id=54511)
$config['smtp_timeout'] = 0;
// SMTP socket context options
// See http://php.net/manual/en/context.ssl.php
// The example below enables server certificate validation, and
// requires 'smtp_timeout' to be non zero.
// $config['smtp_conn_options'] = array(
// 'ssl' => array(
// 'verify_peer' => true,
// 'verify_depth' => 3,
// 'cafile' => '/etc/postfix/smtpd.cert',
// ),
// );
$config['smtp_conn_options'] = null;
