Have you successfully set up RDNS and unblocked port 25 with your server host?
i have reinstall my cwp with new vps.
setting email was successfull send and receive email from gmail.
but after i install auto ssl, roundcube cannot login.
how to setting email with ssl configured?
error log
from 36.74.70.10. Empty startup greeting (localhost:143) in /usr/local/cwpsrv/var/services/roundcube/program$
[14-Oct-2017 16:26:15 +0000]: <m4k785k5> IMAP Error: Login failed for admin@samade.info from 36.74.70.10. Empty startup greeting (localhost:143) in /usr/local/cwpsrv/var/services/roundcube/program$
[15-Oct-2017 11:09:36 +0000]: <r46ecr8l> IMAP Error: Login failed for admin@samade.info from 36.74.70.10. AUTHENTICATE PLAIN: Temporary authentication failure. [srv1.samade.info:2017-10-15 11:09:3$
[15-Oct-2017 11:10:36 +0000]: <m4k785k5> IMAP Error: Login failed for admin@samade.info from 36.74.70.10. AUTHENTICATE PLAIN: Temporary authentication failure. [srv1.samade.info:2017-10-15 11:10:3$
[15-Oct-2017 11:12:23 +0000]: <m4k785k5> IMAP Error: Login failed for admin@samade.info from 36.74.70.10. AUTHENTICATE PLAIN: Temporary authentication failure. [srv1.samade.info:2017-10-15 11:12:2$
[15-Oct-2017 11:13:35 +0000]: <m4k785k5> IMAP Error: Login failed for admin@samade.info from 36.74.70.10. AUTHENTICATE PLAIN: Temporary authentication failure. [srv1.samade.info:2017-10-15 11:13:3$
[15-Oct-2017 11:27:15 +0000]: <r46ecr8l> IMAP Error: Login failed for admin@samade.info from 36.74.70.10. AUTHENTICATE PLAIN: Temporary authentication failure. [srv1.samade.info:2017-10-15 11:27:1$
[15-Oct-2017 11:34:30 +0000]: <r46ecr8l> IMAP Error: Login failed for admin@samade.info from 36.74.70.10. AUTHENTICATE PLAIN: Temporary authentication failure. [srv1.samade.info:2017-10-15 11:34:3$
[15-Oct-2017 11:37:23 +0000]: <r46ecr8l> IMAP Error: Login failed for admin@samade.info from 36.74.70.10. AUTHENTICATE PLAIN: Temporary authentication failure. [srv1.samade.info:2017-10-15 11:37:2$
$ /usr/local/cwpsrv/var/services/roundcube/program/lib/Roundcube/rcube_imap.php on line 193 (POST /?_task=login&_action=login)
[15-Oct-2017 11:59:26 +0000]: <r46ecr8l> IMAP Error: Login failed for isfana@samade.info from 36.74.70.10. AUTHENTICATE PLAIN: Temporary authentication failure. [srv1.samade.info:2017-10-15 11:59:$