Postfix and Roundcube Shows time out

Hello,

After new install of centos panel on centos 7.x, emails is not working. i created email id login into roundcube but it just keep try sent email and after few secs it shows "Time out"message on screen.

Postfix + dovecot is shows running fine. i once again rebuild it but same problem.,

Webmail
===============
Log Files (roundcube)
/usr/local/cwpsrv/var/services/roundcube/logs/

[07-Mar-2018 12:24:13 UTC] PHP Fatal error:  Uncaught Error: Class 'Mail_mime' not found in /usr/local/cwpsrv/var/services/roundcube/program/steps/mail/sendmail.inc:364
Stack trace:
#0 /usr/local/cwpsrv/var/services/roundcube/index.php(291): include_once()
#1 {main}
  thrown in /usr/local/cwpsrv/var/services/roundcube/program/steps/mail/sendmail.inc on line 364
[07-Mar-2018 12:30:06 UTC] PHP Fatal error:  Uncaught Error: Class 'Mail_mime' not found in /usr/local/cwpsrv/var/services/roundcube/program/steps/mail/sendmail.inc:364
Stack trace:
#0 /usr/local/cwpsrv/var/services/roundcube/index.php(291): include_once()
#1 {main}
  thrown in /usr/local/cwpsrv/var/services/roundcube/program/steps/mail/sendmail.inc on line 364

/var/log/dovecot.log

Mar 07 20:23:58 imap(bookings@domain.com): Warning: autocreate plugin is deprecated, use mailbox { auto } setting instead
Mar 07 20:23:58 imap(bookings@domain.com): Warning: autocreate plugin is deprecated, use mailbox { auto } setting instead
Mar 07 20:23:58 dict: Error: Failed to initialize dictionary 'quotadict': dict mysql: Can't open configuration file /etc/dovecot/dovecot-dict-quota.conf: Permission denied
Mar 07 20:23:58 imap(bookings@domain.com): Error: read(/var/run/dovecot/dict) failed: Remote disconnected
Mar 07 20:23:59 imap(bookings@domain.com): Warning: autocreate plugin is deprecated, use mailbox { auto } setting instead
Mar 07 20:23:59 dict: Error: Failed to initialize dictionary 'quotadict': dict mysql: Can't open configuration file /etc/dovecot/dovecot-dict-quota.conf: Permission denied
Mar 07 20:23:59 imap(bookings@domain.com): Error: read(/var/run/dovecot/dict) failed: Remote disconnected
Mar 07 20:23:59 imap(bookings@domain.com): Warning: autocreate plugin is deprecated, use mailbox { auto } setting instead
Mar 07 20:24:03 imap(bookings@domain.com): Warning: autocreate plugin is deprecated, use mailbox { auto } setting instead
Mar 07 20:24:03 imap(bookings@domain.com): Warning: autocreate plugin is deprecated, use mailbox { auto } setting instead
Mar 07 20:30:25 master: Warning: Killed with signal 15 (by pid=1 uid=0 code=kill)
Mar 07 20:30:25 log: Warning: Killed with signal 15 (by pid=1 uid=0 code=kill)

/var/log/dovecot-info.log

Mar 07 20:23:58 imap(bookings@domain.com): Info: Disconnected: Logged out in=70 out=582
Mar 07 20:23:59 imap-login: Info: Login: user=<bookings@domain.com>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=15855, secured, session=<UtM5otFmqAB/AAAB>
Mar 07 20:23:59 imap(bookings@domain.com): Info: Disconnected: Logged out in=76 out=495
Mar 07 20:23:59 imap-login: Info: Login: user=<bookings@domain.com>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=15859, secured, session=<T+I+otFmrgB/AAAB>
Mar 07 20:23:59 imap(bookings@domain.com): Info: Disconnected: Logged out in=233 out=891
Mar 07 20:24:03 imap-login: Info: Login: user=<bookings@domain.com>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=15870, secured, session=<cFBwotFmsAB/AAAB>
Mar 07 20:24:03 imap(bookings@domain.com): Info: Disconnected: Logged out in=32 out=455
Mar 07 20:24:03 imap-login: Info: Login: user=<bookings@domain.com>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=15873, secured, session=<Npt2otFmsgB/AAAB>
Mar 07 20:24:03 imap(bookings@domain.com): Info: Disconnected: Logged out in=44 out=562
Mar 07 20:30:25 master: Info: Dovecot v2.2.10 starting up for imap, pop3, lmtp, sieve (core dumps disabled)

Log Files Postifx (smtp server):
/var/log/maillog

Mar  7 20:50:18 server1 postfix/local[18305]: 21F3041EBB: to=<root@server1.domain.com>, orig_to=<root>, relay=local, delay=0.17, delays=0.13/0/0/0.04, dsn=2.0.0, status=sent (forwarded as 3876740038)
Mar  7 20:50:18 server1 postfix/qmgr[17319]: 3876740038: to=<info@newdomain.com>, orig_to=<root>, relay=none, delay=0.07, delays=0.04/0.03/0/0, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to mail.matlidigital.com[94.102.48.82]:25: Connection timed out)
Mar  7 20:50:18 server1 postfix/qmgr[17319]: 21F3041EBB: removed
Mar  7 20:50:35 server1 postfix/qmgr[17319]: CF2CF41EB3: from=<root@server1.domain.com>, size=656, nrcpt=1 (queue active)
Mar  7 20:50:35 server1 postfix/qmgr[17319]: CF2CF41EB3: to=<info@newdomain.com>, orig_to=<root>, relay=none, delay=1488, delays=1488/0/0/0, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to mail.newdomain.com[96.125.48.84]:25: Connection timed out)

at rDNS page panelurl /admin/index.php?module=rdns_checker

it shows me no records even the ips dns record is properly point to the server hostname.

check image attached

please help me because its server from aliyun china and they are not user friendly, so tell me how i fix rDNS record ?

image link : https://ibb.co/dG2R57

Having same problem 
But still cloud not find any fix.
If you find please share with me.

Thanks

error say's that permissions are wrong for this file:  /etc/dovecot/dovecot-dict-quota.conf try to check it

Code: [Select]

stat /etc/dovecot/dovecot-dict-quota.conf
It should looks like this

Code: [Select]

# ls -la /etc/dovecot/dovecot-dict-quota.conf
-rw-r--r-- 1 root root 274 Oct 28 12:32 /etc/dovecot/dovecot-dict-quota.conf

Code: [Select]

chown root.root /etc/dovecot/dovecot-dict-quota.conf
chmod 644 /etc/dovecot/dovecot-dict-quota.conf