One of the most convenient features of using a mail client like Postbox is the ability to be productive while offline. Even without an internet connection, you can still use Postbox to read, respond to, and organize messages. Once you reconnect, Postbox will send any messages in your outbox, and update any changes that were made to your accounts.
Here's what you can expect while working offline:
- Every message in your Inbox(es) is available for offline use.
- You can configure any additional IMAP folders to be available offline (see these instructions).
- Any messages composed (new, replied, or forwarded) will be placed in the Local Folders | Unsent folder when you click the Send button, and stay there until the connection is restored.
You can configure each account's offline settings by going to:
Mac: Postbox > Preferences > Accounts > [your account] > Local Storage
Windows: Tools > Options > Accounts > [your account] > Local Storage
Here, you can decide whether your Inbox will be available offline, and configure whether new folders created in the account will be available offline as well. In addition, clicking the Select folders for offline use... button will let you place a check mark next to any additional folders that you would like to make available.
Note: In order to configure offline settings, make sure the account, and not an account group, is selected.
If you're anticipating working offline, you can tell Postbox to download/sync changes to all messages in your configured email folders and newsgroups. In addition, you can sent all unsent messages, and have Postbox go into Work Offline mode once the process is complete.
To download/sync your accounts in Postbox, go to File > Offline > Download/Sync Now...
Note: In order to download/sync your account, make sure the account, and not an account group, is selected.
Manually Working Offline
Postbox will automatically detect wether you have an internet connection, and configure itself accordingly. However, you can tell Postbox to "Work Offline" if you don't want to make any connections with your mail servers to download and sync your messages. To do this go to File > Offline > Work Offline, or click the lightning symbol at the bottom left corner of the Postbox window.