Hello, I installed roundcube on 000webhost with the automatic installer, I finished the installation, I deleted the file system after testing sending messages, and when I delete the installation folder I refreshed the page and I came across the page user login password and server but when I find this information?
thank you
You mean webmail/roundcube email in cpanel? The automatic installer is broken unless it’s been fixed very recently. Does it need your email address and account password to get into it?
I installed roundcube on the server but what 000webhost-mail address and password to use when installing roundcube is over I do not use it to 000webhost, I board not filled the SMTP because I can not know and IMAP. 
As I know your Roundcube will be broken. It needs SMTP server in order to function properly. These email scripts are very difficult to set up.
How would roundcube need a SMTP server?
Because it has to send emails somehow.
It can be configured to use the PHP mail() function, no SMTP is needed to get it working.