IRedMail - Roundcube Webmail - Unable to connect to IMAP server?

Question

Mail server

set up a mail server according to this manual [url= http://faq-mse.perm.ru/technical-faq/%D0%BD%D0%B0%... at https://mail.***** *****g.ru/iredadmin enters the admin panel, even added a new admin user for the *******g.ru domain, reached the point

We go to the address mail.mse.perm.org/mail, this is the address where the entrance to the mailbox is located, the user login is [email protected]**********g.org

, this is where the problems begin, I can’t get into the mail - when you enter the CORRECT password, Roundcube says that

Unsuccessful connection to IMAP server

, and if you enter a deliberately wrong password -

Unsuccessful login attempt.

. hence the conclusion that the user and password check is successful, something with the server itself. help me find what's wrong.
mail.err when entering the correct password

ar 13 12:47:52 mail roundcube: IMAP Error: Login failed for [email protected]*************g.ru from 192.168.0.100. LOGIN: Internal error occurred. Refer to server log for more information. in /usr/share/apache2/roundcubemail-1.0.4/program/lib/Roundcube/rcube_imap.php on line 184 (POST /mail/?_task=login?_task=login&_action=login)

hosts

127.0.0.1 mail.***********g.ru epps-server localhost
127.0.0.1 localhost
127.0.1.1 epps-server
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
127.0.0.1 *********g.ru
127.0.0.1 **********.ru
127.0.0.1 **********.ru

/usr/share/apache2/roundcubemail-1.0.4/program/lib/Roundcube/rcube_imap.php on line 184 (highlighted)

else if ($this->conn->error) {
if ($pass && $user) {
$message = sprintf("Login failed for %s from %s. %s",
$user, rcube_utils::remote_ip() , $this->conn->error);
rcube::raise_error(array('code' => 403, 'type' => 'imap',
[b]'file' => __FILE__, 'line' => __LINE__,[/b]
'message' => $ message), true, false);
}
}

Answer 1

We need a web server log. There, find an error at the time "13 12:47:52" and fix it. Also, try to telnet directly to the imap server and make sure everything is fine with imap.