Hi Oliver,
There are several reasons for the timeouts appearing in several email clients. Most probably the number/size of emails present in that particular folder too are responsible to cause the email client to timeout when connecting & fetching/retrieving data from the server. In your case, does that folder contain many emails or is huge in size?
You can try the below given steps to speed up your email client a bit..
- Launch the ThunderBird Email client.
- Click on Tools > Account Settings.
- Under the IMAP account you'd find "Offline & Disk Space".
- Check the box next to "Make the messages in my Inbox available when I am working offline."
- Doing so will download the messages (headers + body) from the server to your local hard drive (similarly to POP3), making the messages to load faster in your email client, while maintaining the advantages of IMAP.
- You can also select other folders to be available offline. Right click on the folder you wish to make available offline, select it's Properties & then enable the Offline tab.
- As a result of these changes, you’d get the speed of POP, multiple platform sync; your messages stay on the server & are backed up on your hard drive as well..
If you continue to face the problem, would it be fine if we migrate your account to one of our other/new Linux servers this upcoming weekend?