Thunderbird - Rollback Checklist
Removing Large Items Before Email Migration
From Thunderbird's Edit menu, select Find, then Search Messages. A Search Messages dialog box will open.
Change Search for messages in to your account (this will be the choice in the list just above your Inbox).
Change the first criterion drop-down list to Size (KB).
Change the second criterion drop-down list to is greater than.
In the field next to is greater than, enter 20000.
(optional) Click the columns icon at the right end of the header row for your search results, then click Size. This will add a Size column to your results.
The search results will populate at the bottom of the window. From here you can open, manage and delete messages and their attachments. Messages that you delete will remain in the search area, but will have Deleted Items listed as its folder.
Deleted Items Warning
Large Deleted Items Folders
Deleted Items folders that are large in size can slow down your migration process. We will migrate your Deleted Items folder, but if these are messages you do not need, emptying the Deleted Items folder will speed up your migration process.
Last updated October 24, 2013 @ 11:20 am