Note: The total time taken by application in re-indexing, depends on the number of emails. Now, restart the Thunderbird and re-indexing process will begin automatically.Delete global-messages-db.sqlite file from your local machine to force Thunderbird to download all messages POP3.Find global-messages-db.sqlite file in your Thunderbird Profile.Sometimes this file gets corrupted due to which Thunderbird becomes unable to download all messages and Thunderbird not downloading new emails issue occurs. It replicates emails from the MBOX files generated by synchronization. This file contains a copy of all messages of the user’s Thunderbird account. Global searching/ indexing is the global database that utilizes global-messages-db.sqlite as the search index. Case 1: If Your Thunderbird Account is POP3 Therefore, you need to force Thunderbird to download all messages and below are the guidelines for same. Well, it can happen in any case so no matter which protocol you are using POP or IMAP. If your Mozilla Thunderbird application is having corruption, fragmentation or any other issue then, it is quite common that it will not download your emails. How to Fix Thunderbird Not Downloading New Messages Issue? Pro Tip – Download SysTools MBOX to Outlook Converter if you are tired of such Thunderbird errors and want to import MBOX to Outlook PST / EML / MSG / NSF / HTML / PDF file format quickly without any kind of data loss.

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