[[!comment format=mdwn
 username="guilhem"
 avatar="http://cdn.libravatar.org/avatar/86d6cb4bde1ef88730b14ccad0414c28"
 subject="comment 5"
 date="2015-09-28T23:03:31Z"
 content="""
The IMAP connection used the default socket timeout (60s).  I know some servers send back continuation responses (“+”) to keep the connection alive and avoid triggering the timeout, but I don't kown Dovecot 2.2.13 behaves regarding that.  I changed the default socket timeout to 180s, could you try again?  If that solves your problem, I think the proper solution would be to change to the socket options to use keepalive probes either at the TCP level or higher at the IMAP layer.
"""]]