Thunderbird Offline mode
Thunderbird comes with a built-in offline mode, which is exactly what it sounds like: an optional mode for managing your email offline. While in offline mode, you can use the client to read emails (as long as they have been synced to local before) and create emails (which will be sent, when you go online again).
Configure Thunderbird IMAP Offline
You can use the thunderbird mail client in offline mode with an IMAP email account such as your ITET account.
In thunderbird, go to File > Offline > Offline Settings. Then, check the first box beneath the Message Synchronising Section which will make messages in your inbox available in offline mode.
Next, click on Advanced.... A window appears allowing you to choose which folders of your account will be made available to work offline.
Click OK (twice) and go to File > Offline > Work Offline. You will be asked whether you want to download your messages for offline use. Click Download Now.
- Depending on the amount of data and your internet connection speed, this may take a long time. The status of the synchronization is displayed at the bottom of the thunderbird main window.
You may now disconnect your computer from the internet and write/delete/move messages as you like. Note that when composing a new message there is no longer a Send button. However, there is a Send Later button instead.
Once you have finished working offline. Go to File > Offline > Work Offline. If you composed messages while being offline, you will be prompted to confirm the sending of those messages. Click on Send Now if you would like to send them now.
- Beside from sending new messages, all other changes you made while being offline will be synchronized now. Again, the status of the synchronization is displayed at the bottom of the thunderbird main window.