Hello again, a long time later. Since my last post we have updated our e-mail server to new Zimbra 7.1.4.
After this update, all interfaces with sogo and openchange seem to be OK, no connection problems neither IMAP synchronization problems. So far so good. I will be performing some tests on the next few days, after which I will happily tag this as "SOLVED". Thank you everyone for your support -- [email protected] https://inverse.ca/sogo/lists
