roundcube is not in official portage yet but should be in the webapps overlay therefor we need layman[[BR]]

{{{
# emerge subversion layman
# layman -a webapps-experimental
# echo source /usr/portage/local/layman/make.conf >> /etc/make.conf
# echo mail-client/roundcube ~* >> /etc/portage/package.keywords
# echo mail-client/roundcube mysql vhosts >> /etc/portage/package.use
# emerge roundcube
}}}

follow the information provided by the ebuild[[BR]]

{{{
# mysql -uroot -p
}}}

{{{
> create database roundcubemail_web1;
> GRANT ALL PRIVILEGES ON roundcubemail_web1.* TO roundcube@localhost IDENTIFIED BY '<password>';
}}}
{{{
# mysql -uroot -p roundcubemail_web1 < /var/www/web1/web/roundcube/SQL/mysql.initial.sql
}}}
!!! change /etc/vhosts/webapp-config (see above) before the next command !!!
{{{
# webapp-config -I -h www.thinkthinkdo.com -d roundcube roundcube 0.1_rc2
}}}
in /var/www/web1/web/roundcube/config/main.inc.php change[[BR]]
{{{
$rcmail_config['default_host'] = ''; to $rcmail_config['default_host'] = 'ssl://localhost:993';
}}}
in /var/www/web1/web/roundcube/config/db.inc.php change[[BR]]
{{{
$rcmail_config['db_dsnw'] = 'mysql://roundcube:<password>@localhost/roundcubemail_web1';
}}}