root@kolabfek001a  ~ # yum list guam Installed Packages guam.x86_64 0.8.3-1.1.el6.kolab_14 @kolab-14-extras-audit
IMAP Idle Connections are closed after 300 seconds if the IMAP connection is
encrypted (direct SSL/TLS or STARTTLS) and the connection goes through guam.
We tested this several times and tcpdump on client shows this on the two last lines of the pcap file:
36 15.483402 10.12.23.120 10.160.96.121 TCP 66 60762 > imap [ACK] Seq=601 Ack=4163 Win=41974 Len=0 TSval=51771942 TSecr=1908298286 37 319.012712 10.160.96.121 10.12.23.120 TCP 60 imap > 60762 [RST, ACK] Seq=4163 Ack=601 Win=4740 Len=0
Connections on cyrus direct without guam stay open and are not hit by this problem.
Is ther some guam config setting to enable "IMAP Idle" via guam or did we find some bug here?