One of the most convenient features of using a mail client like Postbox is the ability to be productive while offline. To download all message headers or message bodies, navigate to Preferences | Options > Advanced > General and select:įinally, if you're having trouble syncing messages across devices, navigate to Preferences | Options > Advanced > General and select: Right-click on the folder in your folder tree, then select Properties. This is particularly useful if you have server-side filters that move messages into other folders. With this in mind, there are a few changes that you can make to more aggressively sync your messages.įor IMAP users, you can configure Postbox to check folders other than the inbox for new mail. Alternatively, you can go to the Tools menu and select Indexing > Index All Folders, and this will download and index all of your messages. Thus, the easiest way to ensure that Postbox is in sync with your mail servers is to simply leave Postbox running during meetings, lunch, or overnight. The indexer will step through each folder to download headers and message bodies, and will then index them to make searches fast and accurate.

When Postbox detects that your computer is idle, it will download your messages as part of the indexing process. This approach ensures that the server is not hit with update requests for each folder every time you check for messages, as this degrades performance and bog down your mail servers. Thus, if you move messages to a folder using a different computer or your phone, Postbox will not download the message headers or bodies until you click on the folder. Postbox will check for new messages within the Inbox only. The downside is that if you are disconnected from the network (for example, on a plane), you may not have access to your message bodies, even for messages that you can see in the message list. This approach allows you to receive and review the message list without first having to wait for the message bodies to download, and this is how most email clients work.

However, Postbox will not download the message bodies (the message content) until you click and/or view a message. The headers contain information that populates the message list, such as sender, subject, date, etc. When you click on a folder, Postbox will first download all of the message headers for that folder.

Apple mail download headers only