Just released new SOGo 2.3.0 rpms, to find out more take a look at: http://www.sogo.nu/buzz/2015/article/sogo-230-released.html
Thanks to @Stll0 for the development effort
Can you test it and report in this topic any issue occurred?
To proceed with upgrade click on “Download and Install” button or install Sogo on the Software Center.