Resolved Plesk 17.8 Preview Roundcube login not possible

[timscha]

Hello!

I tried your Preview version 5 of Plesk 17.8 and I got some problems with Roundcube.

Every time I tried to login, I got this message: connection to storage server failed

And yes, I know it's a preview, but unfortunately your bug form does not know about 17.8 yet.

The logs told me the following:

maillog:
dovecot: imap-login: Disconnected (disconnected before auth was ready, waited 0 secs): user=<>, rip=::1, lip=::1, TLS handshaking: SSL_accept() failed: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca: SSL alert number 48, session=<RmepJnhawsIAAAAAAAAAAAAAAAAAAAAB>

Roundcube log:

[01-Oct-2017 08:38:51 UTC] PHP Warning: stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed in /usr/share/psa-roundcube/program/lib/Roundcube/rcube_imap_generic.php on line 949
[01-Oct-2017 08:38:51 UTC] PHP Warning: stream_socket_client(): Failed to enable crypto in /usr/share/psa-roundcube/program/lib/Roundcube/rcube_imap_generic.php on line 949
[01-Oct-2017 08:38:51 UTC] PHP Warning: stream_socket_client(): unable to connect to ssl://localhost:993 (Unknown error) in /usr/share/psa-roundcube/program/lib/Roundcube/rcube_imap_generic.php on line 949
[01-Oct-2017 08:38:51 +0000]: <v006fl77> IMAP Error: Login failed for [email protected] from 87.170.50.55(X-Real-IP: 87.170.50.55). Could not connect to ssl://localhost:993: Unknown reason in /usr/share/psa-roundcube/program/lib/Roundcube/rcube_imap.php on line 193 (POST /roundcube/?_task=login&_action=login)


For your further informations:
- I use Let's Encrypt to secure the domain
- With Horde mail and any other email client a login is possible without problems

 

[UFHH01]

Hi timscha,

pls. note, that you don't provide informations about your current used operating system.

If you experience described issues with dovecot and roundcube, it is most likely the case, that either "SELinux", or/and "apparmor" are blocking your requests, but you could as well have hit a ( possible ) bug. Pls. see:

=> Roundcube stoped working "Connection to imap server failed"​

 

[timscha]

Ups, sorry. I know I missed something.
It's CentOS 7.4, SELINUX is disabled.

I can confirm the fix in your linked thread worked me for me. Thanks!