Thunderbird Attachment Download Error Corrupt Wrong filesize of 29 or 27 bytes Solution

This is an ongoing issue even with the latest Thunderbird 102.x where attachments just won't save or will be corrupt which is a huge interruption to workflow or if you come back later to find out the file you thought you saved is invalid/corrupt and you have perhaps deleted the e-mail.

How to solve the Thunderbird filesize attachment issue?

1. Click on "Settings". then go to "General".

2. Scroll to the bottom to find "Config Editor".

3. Search for "mail.imap.mime_parts_on_demand" and set it to false.

After that your attachments will download properly.

References: https://support.mozilla.org/en-US/questions/1268926


Tags:

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