Hi,
Roundcube seems to be doing an exact string search on my installation. So for example, if I try to search 'SUBMIT ORDER' it can find those emails. But if I change it to 'SUBMIT ORDE' it will fail to find.
I don't think it is related to my IMAP server (dovecot) because if I use other clients (like Squirrel mail or Thunderbird) I don't experience the same problem.
Roundcube is installed on Fedora 21 (roundcubemail-1.0.4-2.fc21.noarch).
Thanks.