I am having a similar but slightly different problem to this. Our IT people changed over the Zimbra server and now my Mfe account has to run without a domain name in the credentials. When I changed the credentials Mfe stopped sending but would receive. So I did a full credential reset and deleted .activesync and .qmf files but now Mfe starts initialising but drops off the server and fails to sync. I notice that even after removing .qmf and .activesync that on opening email my n900 begins to show the Mfe account then it disappears. According to our IT people they have other Nokias (eg E71) running OK so they say it is not the Zimbra server set up. Is there another file somewhere that I need to delete to get a complete clean reinstall of the credentials? Could it be something else? Thankyou. PS. After some experimenting I tried setting sync with no email and it successfully achieved Initialising Synchronisation and synced Calendar and Tasks but dropped out on Contacts.