Unable to connect to the IMAP server (after install lets encrypt)

Hi guys,

I have this error when i want to login to roundcube, that happen after i installed lets encrypt i run daemon.php from sentora like: php -q /etc/sentora/panel/bin/daemon.php

I checked the folder: /etc/dovecot/ and here i have only dovecot.conf.rpmsave nothing else.
On /etc/sentora/configs/dovecot2 i have 4 file .conf and one .sieve

The 2 ports IMAP and POP3 here: https://www.yougetsignal.com/tools/open-ports/ result closed.

In the shell console when i try sistem dovecot status --> -bash: sistem: command not found

How i can fix that error ? 

Thank you