What optional filters can I apply when exporting emails with Zimbra?

You can add `start` and `end` Unix timestamps to filter by date range, and a `query` parameter to search for keywords (e.g., `content:password`). The time values must be in milliseconds, and the query syntax follows Zimbra’s search tips. This allows targeted export of specific emails, as demonstrated in the Zimbra SOAP API Development Guide 4 - Email Export and Folder Sharing.