Unable to login to RoundCube

[jayaprasad24]

Hi,

I am seeing below error while trying to login to Roundcube after installation. Telnet to port 993 is working fine. Dovecot is running without any issues. Trying to resolve this issue since 2 days but could not able to fix it even after trying all the recommended solutions provided in earlier discussions.

[03-Sep-2021 02:05:29 -0400]: <2abed6e2> IMAP Error: Login failed for test.user@abc.com against smtp.abc.com. Could not connect to ssl://smtp.abc.com:993: Unknown reason in /var/www/html/program/lib/Roundcube/rcube_imap.php on line 200 (POST /?_task=login&_action=login)

root@XXXXXXX:/var/www/html/config# telnet smtp.abc.com 993
Trying 172.23.242.194...
Connected to smtp.abc.com.
Escape character is '^]'.

[JohnDoh]

could be a cert validation error, see https://github.com/roundcube/roundcubemail/wiki/FAQ#problems-connecting-imapsmtp-server-via-ssltls