I'm back with problems in software center.
I managed to install RC4 but when I try to install email module in software center I get this error "Resolving RPM dependencies. The install/update may have failed due to metadata caching issues. Please clean the cache by clicking the button below and retry the install/update operation." I cleared yum cache but got the same error.
I thought it's a software center problem and ran in terminal yum install nethserver-mail-server and everything went fine. After that, in terminal i ran yum install nethserver-mail-filter and got this error "Error: clamav-data-empty conflicts with clamav-data-0.99.2-1.el7.noarch
Error: clamav-data conflicts with clamav-data-empty-0.99.2-1.el7.noarch"
Same error if i run in terminal yum install nethserver-getmail.
So I think it's somehow related with clamav.
Ssame errors appear for pop3proxy, reverse proxy, smtp proxy, pop3 connector.
Does anyone have any idea about this error and the fix for it?