Folders stop syncing after a period of use, usually 2–4 hours

First try updating to the latest test version: Hold down ⌥ when clicking “Check Now” in the Software Update preferences pane. I'm very interested in solving this problem since I've received some similar reports without being able to track down the exact issue.

Keep the Activity Viewer (⌥⌘0) open and when a mailbox has entered the failed state then see if you can find the relevant part of the log file (select connections in the upper part of the window and review logs in the lower part of the window). You may have to take the entire account offline since it can be tricky to copy/paste the log if logging is still active. You can send it via “Help ▸ Send Feedback” if you do not want to add it to this ticket.

Thanks in advance!

Hi Benny. I've taken some screenshots of the issue when it happened again just now, including the activity monitor. The steps were (with screenshot filenames corresponding to the numbers below):

1) An account becomes "unavailiable"
2) The activity monitor shows "R9 LOGOUT"
3) I sync the relevant inbox; nothing happens
4) I sync the whole account; things start to happen
5) After the account has synced the activity monitor shows "S24 IDLE"
6) I am using versino 1.7.2 (4132)

Hope this helps!

Thanks for the update. I need you to update to the latest beta (see the Software Update preferences pane) and try again. This is what I need you to do:

1. Keep the Activity Viewer open.
   
2. When the account goes to the “unavailable” state (it appears to no longer be “failed” as originally described) then use “Help ▸ Send Server Logs” to send me more data (reference this ticket in the email).

Thanks in advance!