RoundCube login window | connection error with the server!

[feerdispzoo]

Hello,
I've installed roundcube. Now I correct open: my_ip/rouncube

When I try login on email then I get:
RoundCube login window | connection error with the server!

I've installed in this way.

[root@vpscustombuild]# ./build roundcube
Found MySQL version 5.5
Granting access: GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,DROP,ALTER,LOCK TABLES                                                                                                             ,INDEX,REFERENCES ON da_roundcube.* TO 'da_roundcube'@'localhost';
Setting password: SET PASSWORD FOR 'da_roundcube'@'localhost' = PASSWORD('*****');
Editing roundcube configuration...
grep: /etc/exim.conf: No such file or directory
Roundcube 1.5.2 has been installed successfully.
WARNING: Changed defaults (These config options have new default values):
- 'skin'
- 'smtp_port'
- 'smtp_user'
- 'smtp_pass'
- 'jquery_ui_skin_map'
Executing database schema update.
NOTICE: Update dependencies by running `php composer.phar update --no-dev`
done.
This instance of Roundcube is up-to-date.
Have fun!
[root@vps custombuild]#

Any solution?

 

[factor]

grep: /etc/exim.conf: No such file or directory

is exim installed?