Found this link in the forum with regards to this issue:
http://forum.centos-webpanel.com/e-mail/roundcube-webmail/msg68/#msg68
Has it been fixed? I can send but cannot receive emails, also when clicking "Roundcube Webmail" from the user panel, it opens up a window with IP/roundcube instead of FQDN/roundcube. Also, on the user login field, I had to put username@domainname.tld instead of just the username and password. Appreciate any help.
its fixed, but it will be in the next release.